Wake-up signal error handling

ABSTRACT

Methods, systems, and devices for wireless communications are described. Techniques are described to enable wake-up signal (WUS) error handling at a user equipment (UE). The UE may detect an error pattern when attempting to receive a WUS from a base station based on a configuration for receiving the WUS. For example, the base station may transmit the configuration for receiving the WUS to a set of UEs including the UE. Based on detecting the error pattern, the UE may perform a mitigation operation based on determining the error pattern, such as waking up multiple cells to receive a transmission indicated by the WUS, transmitting a radio link failure indication to the base station, etc. Additionally or alternatively, the base station may transmit multiple WUSs to the UEs, such as a first WUS according to the configuration and a second WUS according to a reconfiguration.

CROSS REFERENCE

The present Application for Patent is a Divisional of U.S. Pat.Application No. 17/180,493 by Lee et al., entitled “WAKE-UP SIGNAL ERRORHANDLING,” filed Feb. 19, 2021, assigned to the assignee hereof, andexpressly incorporated by reference herein.

FIELD OF TECHNOLOGY

The following relates to wireless communications, including wake-upsignal (WUS) error handling.

BACKGROUND

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonalfrequency division multiplexing (DFT-S-OFDM). A wireless multiple-accesscommunications system may include one or more base stations or one ormore network access nodes, each simultaneously supporting communicationfor multiple communication devices, which may be otherwise known as userequipment (UE). In some wireless communications systems, a UE may entera discontinuous reception (DRX) mode to conserve power usage at the UE.

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support wake-up signal (WUS) error handling.Generally, the described techniques provide for a user equipment (UE) toreceive a configuration for receiving a WUS from a base station. Thebase station may transmit the configuration for receiving the WUS to aset of UEs (e.g., one or more UEs) including the UE, where theconfiguration includes a size of the WUS and respective starting bitpositions of the WUS for each UE of the set of UEs to read.Subsequently, the UE may monitor for and receive a WUS from the basestation according to the configuration (e.g., based on a startingposition for the UE indicated in the configuration or other factors).However, in some examples, the UE may determine that an error patternoccurs when attempting to receive the WUS. Accordingly, the UE may thenperform one or more mitigation operations based on determining the errorpattern. For example, the UE may wake up multiple cells (e.g., a primarycell (PCell), a primary secondary cell (PSCell), one or more secondarycells (SCells), etc.) to receive a transmission indicated by the WUSbased on determining the error pattern. Additionally or alternatively,the UE may transmit a radio link failure (RLF) indication to the basestation to release a connection with the base station if a number oferror patterns occur consecutively when trying to receive the WUS andmay attempt to reconnect to the base station (e.g., to rectify the errorpatterns).

In some examples, the base station may identify that at least one UE ofthe set of UEs is no longer connected to the base station. Accordingly,based on this at least one UE no longer being connected to the basestation, the configuration for the WUS may no longer be valid. The basestation may then determine a reconfiguration for other UEs, such as theremaining UEs, to receive the WUS (e.g., with an updated size of the WUSand updated respective starting bit positions that may be based onconfiguration information for the at least one UE being removed) and maytransmit the reconfiguration to the other UEs, such as the remainingUEs. However, one or more of the remaining UEs may not receive thereconfiguration before receiving a next WUS. As such, the base stationmay transmit multiple WUSs to one or more of the remaining UEs, such asa first WUS according to the initial configuration and a second WUSaccording to the reconfiguration. In some examples, the base station maydifferentiate the multiple WUSs based on scrambling one or more cyclicredundancy checks (CRCs) of one or more WUSs with a radio networktemporary identifier (RNTI) included in each configuration orreconfiguration for a corresponding WUS.

A method for wireless communications at a UE is described. The methodmay include receiving, from a base station, a configuration forreceiving a WUS transmission for a set of multiple UEs including the UE,the configuration including a size of the WUS transmission and a firststarting bit position of the WUS transmission for the UE to read;receiving, from the base station based on the configuration for the WUStransmission, a WUS indicating for the UE to wake up one or more cellsto receive a transmission from the base station based on a configuredoffset between receiving the WUS and receiving the transmission;determining that at least one error pattern of a set of multiple errorpatterns occurs for the received WUS; and performing a mitigationoperation based on determining the at least one error pattern.

An apparatus for wireless communications at a UE is described. Theapparatus may include a processor, memory coupled with the processor,and instructions stored in the memory. The instructions may beexecutable by the processor to cause the apparatus to receive, from abase station, a configuration for receiving a WUS transmission for a setof multiple UEs including the UE, the configuration including a size ofthe WUS transmission and a first starting bit position of the WUStransmission for the UE to read; to receive, from the base station basedon the configuration for the WUS transmission, a WUS indicating for theUE to wake up one or more cells to receive a transmission from the basestation based on a configured offset between receiving the WUS andreceiving the transmission; to determine that at least one error patternof a set of multiple error patterns occurs for the received WUS; and toperform a mitigation operation based on determining the at least oneerror pattern.

Another apparatus for wireless communications at a UE is described. Theapparatus may include means for receiving, from a base station, aconfiguration for receiving a WUS transmission for a set of multiple UEsincluding the UE, the configuration including a size of the WUStransmission and a first starting bit position of the WUS transmissionfor the UE to read; means for receiving, from the base station based onthe configuration for the WUS transmission, a WUS indicating for the UEto wake up one or more cells to receive a transmission from the basestation based on a configured offset between receiving the WUS andreceiving the transmission; means for determining that at least oneerror pattern of a set of multiple error patterns occurs for thereceived WUS; and means for performing a mitigation operation based ondetermining the at least one error pattern.

A non-transitory computer-readable medium storing code for wirelesscommunications at a UE is described. The code may include instructionsexecutable by a processor to receive, from a base station, aconfiguration for receiving a WUS transmission for a set of multiple UEsincluding the UE, the configuration including a size of the WUStransmission and a first starting bit position of the WUS transmissionfor the UE to read; to receive, from the base station based on theconfiguration for the WUS transmission, a WUS indicating for the UE towake up one or more cells to receive a transmission from the basestation based on a configured offset between receiving the WUS andreceiving the transmission; to determine that at least one error patternof a set of multiple error patterns occurs for the received WUS; and toperform a mitigation operation based on determining the at least oneerror pattern.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, performing the mitigationoperation may include operations, features, means, or instructions forwaking up a set of multiple cells to receive the transmission indicatedby the WUS based on determining the at least one error pattern.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the set of multiple cellsincludes a PCell of a master cell group (MCG), one or more SCells of theMCG, a PSCell of a secondary cell group (SCG), one or more SCells of theSCG, or any combination thereof.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, performing the mitigationoperation may include operations, features, means, or instructions fortransmitting, to the base station, an RLF indication to release aconnection with the base station based on determining the at least oneerror pattern and attempting to reestablish a connection with the basestation based on transmitting the RLF indication.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining to transmitthe RLF indication based on determining that a number of error patternsfor receiving the WUS transmission according to the configuration occur,where the number of error patterns satisfies a threshold value.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from thebase station, a reconfiguration message for the WUS transmission, thereconfiguration message including a second size of the WUS transmissiondifferent than the size of the WUS transmission, including a secondstarting bit position for the UE to read of the WUS transmissiondifferent than the first starting bit position, or both and receiving,from the base station, a second WUS based on the reconfigurationmessage.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, to thebase station, a reconfiguration complete message indicating successfulreception of the reconfiguration message, where the second WUS may bereceived based on transmitting the reconfiguration complete message.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the configuration for the WUStransmission further includes an indication of a first power saving (PS)RNTI with which a CRC of the WUS may be scrambled and the method,apparatuses, and non-transitory computer-readable medium may includefurther operations, features, means, or instructions for receiving theWUS based on the CRC of the WUS being scrambled with the first PS-RNTIand receiving, from the base station, a second WUS with a CRC scrambledwith a second PS-RNTI, the second WUS indicating for the UE to wake upone or more additional cells to receive the transmission from the basestation.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for waking up the one ormore cells indicated by the WUS based on the configuration for the WUStransmission including the indication of the first PS-RNTI.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from thebase station, a reconfiguration message for the WUS transmission, thereconfiguration message including an indication of the second PS-RNTIand waking up the one or more additional cells indicated by the secondWUS based on receiving the reconfiguration message including theindication of the second PS-RNTI.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the error patternof the set of multiple error patterns may include operations, features,means, or instructions for determining that a size of the WUS may bedifferent than the size of the WUS transmission indicated in theconfiguration, that the size of the WUS may be smaller than or equal tothe starting bit position for the UE to read of the WUS transmissionindicated in the configuration, that a number of bits for an SCelldormancy indication in the WUS may be different than a number ofdormancy groups for the UE, that the WUS indicates for the UE to notwake up a PCell and for the UE to wake up one or more SCells, or anycombination thereof.

A method for wireless communications at a base station is described. Themethod may include transmitting, to a set of multiple UEs, aconfiguration for receiving a WUS transmission for the set of multipleUEs, the configuration including a size of the WUS transmission andrespective starting bit positions of the WUS transmission for each UE ofthe set of multiple UEs to read; determining that at least one UE of theset of multiple UEs is no longer connected to the base station and thata subset of the set of multiple UEs different than the at least one UEare connected to the base station; transmitting, to the subset of theset of multiple UEs, a reconfiguration message for receiving the WUStransmission based on determining that the at least one UE is no longerconnected to the base station; and transmitting, to the subset of theset of multiple UEs, a WUS based on the reconfiguration message.

An apparatus for wireless communications at a base station is described.The apparatus may include a processor, memory coupled with theprocessor, and instructions stored in the memory. The instructions maybe executable by the processor to cause the apparatus to transmit, to aset of multiple UEs, a configuration for receiving a WUS transmissionfor the set of multiple UEs, the configuration including a size of theWUS transmission and respective starting bit positions of the WUStransmission for each UE of the set of multiple UEs to read; todetermine that at least one UE of the set of multiple UEs is no longerconnected to the base station and that a subset of the set of multipleUEs different than the at least one UE are connected to the basestation; to transmit, to the subset of the set of multiple UEs, areconfiguration message for receiving the WUS transmission based ondetermining that the at least one UE is no longer connected to the basestation; and to transmit, to the subset of the set of multiple UEs, aWUS based on the reconfiguration message.

Another apparatus for wireless communications at a base station isdescribed. The apparatus may include means for transmitting, to a set ofmultiple UEs, a configuration for receiving a WUS transmission for theset of multiple UEs, the configuration including a size of the WUStransmission and respective starting bit positions of the WUStransmission for each UE of the set of multiple UEs to read; means fordetermining that at least one UE of the set of multiple UEs is no longerconnected to the base station and that a subset of the set of multipleUEs different than the at least one UE are connected to the basestation; means for transmitting, to the subset of the set of multipleUEs, a reconfiguration message for receiving the WUS transmission basedon determining that the at least one UE is no longer connected to thebase station; and means for transmitting, to the subset of the set ofmultiple UEs, a WUS based on the reconfiguration message.

A non-transitory computer-readable medium storing code for wirelesscommunications at a base station is described. The code may includeinstructions executable by a processor to transmit, to a set of multipleUEs, a configuration for receiving a WUS transmission for the set ofmultiple UEs, the configuration including a size of the WUS transmissionand respective starting bit positions of the WUS transmission for eachUE of the set of multiple UEs to read; to determine that at least one UEof the set of multiple UEs is no longer connected to the base stationand that a subset of the set of multiple UEs different than the at leastone UE are connected to the base station; to transmit, to the subset ofthe set of multiple UEs, a reconfiguration message for receiving the WUStransmission based on determining that the at least one UE is no longerconnected to the base station; and to transmit, to the subset of the setof multiple UEs, a WUS based on the reconfiguration message.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from a UE ofthe subset of the set of multiple UEs, an RLF indication to release aconnection with the UE based on a number of error patterns occurring forthe UE when receiving the WUS and attempting to reestablish theconnection with the UE based on receiving the RLF indication.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the RLF indication may bereceived based on the number of error patterns satisfying a thresholdvalue.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from each UEof the subset of the set of multiple UEs, a reconfiguration completemessage indicating successful reception of the reconfiguration message,where the WUS may be transmitted according to the reconfigurationmessage based on receiving the reconfiguration complete message fromeach UE of the subset of the set of multiple UEs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, to thesubset of the set of multiple UEs, a first WUS according to theconfiguration for the WUS transmission, where a first CRC of the firstWUS may be scrambled with a first PS-RNTI included in the configurationfor the WUS transmission and transmitting, to the subset of the set ofmultiple UEs, a second WUS according to a reconfiguration in thereconfiguration message for the WUS transmission, where a second CRC maybe scrambled with a second PS-RNTI included in the reconfigurationmessage for the WUS transmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from each UEof the subset of the set of multiple UEs, a reconfiguration completemessage indicating successful reception of the reconfiguration messageand refraining from transmitting a subsequent WUS according to theconfiguration for the WUS transmission based on receiving thereconfiguration complete message from each UE of the subset of the setof multiple UEs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system thatsupports wake-up signal (WUS) error handling in accordance with aspectsof the present disclosure.

FIG. 2 illustrates an example of a wireless communications system thatsupports WUS error handling in accordance with aspects of the presentdisclosure.

FIG. 3 illustrates an example of a flowchart in accordance with aspectsof the present disclosure.

FIG. 4 illustrates an example of a process flow that supports WUS errorhandling in accordance with aspects of the present disclosure.

FIGS. 5 and 6 show block diagrams of devices that support WUS errorhandling in accordance with aspects of the present disclosure.

FIG. 7 shows a block diagram of a communications manager that supportsWUS error handling in accordance with aspects of the present disclosure.

FIG. 8 shows a diagram of a system including a device that supports WUSerror handling in accordance with aspects of the present disclosure.

FIGS. 9 and 10 show block diagrams of devices that support WUS errorhandling in accordance with aspects of the present disclosure.

FIG. 11 shows a block diagram of a communications manager that supportsWUS error handling in accordance with aspects of the present disclosure.

FIG. 12 shows a diagram of a system including a device that supports WUSerror handling in accordance with aspects of the present disclosure.

FIGS. 13 through 18 show flowcharts illustrating methods that supportWUS error handling in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

In some wireless communications systems, a UE may enter a discontinuousreception (DRX) mode to, for example, conserve power usage at the UE.When a UE operates in a DRX mode, the UE may transition betweendifferent states, such as an active state and an inactive state in a DRXcycle. When the UE is in an active DRX duration (e.g., active state),the UE may be configured to transmit and receive information, and whenthe UE is in an inactive DRX duration (e.g., inactive state) the UE mayrefrain from monitoring for signals from another device, such as a basestation, and may also refrain from transmitting or receiving some typesof information. Before transitioning to the active state during anactive DRX duration, the UE may receive the WUS from the base stationindicating whether the UE is to wake up and which cells of the UE towake up for the subsequent active DRX duration. However, one or moreerrors may occur when the UE receives the WUS. Accordingly, techniquesare desired for mitigating such errors for the UE in receiving a WUS.

In some wireless communications systems, a base station may transmit awake-up signal (WUS) (e.g., as part of operating in a discontinuousreception (DRX) mode) to one or more UEs (e.g., multiple UEs) toindicate which UE is to wake up for a subsequent awake period tocommunicate with the base station. For example, the WUS may includemultiple blocks, where each block of the multiple blocks may beconfigured for a corresponding UE of the multiple UEs. Additionally,each block may include multiple bits to indicate which cells that thecorresponding UE is to wake up for (e.g., a primary cell (PCell), aprimary secondary cell (PSCell), one or more secondary cells (SCells)configured into one or more SCell dormancy groups, etc.) incommunicating with the base station during the subsequent awake period.Accordingly, the base station may indicate a configuration of the WUS toat least some of, if not each of, the multiple UEs and the configurationmay include a starting bit location of the WUS to indicate where each UElooks for wake up indication(s) (e.g., a start of a corresponding blockof the WUS for a given UE) and may indicate a total size of the WUS.

However, if at least one of the UEs has a connection to the base stationreleased or transferred to a different base station (e.g., or adifferent cell of the same base station), the configuration of the WUSmay change such that one or more of the remaining UEs connected to thebase station may experience issues when attempting to receivecorresponding wake up indications in the WUS (e.g., based on block(s)corresponding to the at least one UE whose connection isreleased/transferred being removed from the WUS). Additionally oralternatively, when the base station determines that the at least one UEhas the connection to the base station released or transferred, the basestation may transmit a reconfiguration message to reconfigure how someother UEs, such as the remaining UEs, should read the WUS (e.g.,different total size, different starting bit positions for each UE).Some of the UEs, however, may not receive the reconfiguration messagebefore an awake period (e.g., a period during which the UEs areconfigured to wake up and detect signaling), resulting in the UEs usingan older configuration that is no longer valid to try and receivecorresponding later wake up indications in the WUS.

As described herein, when receiving a WUS that is, for example, intendedfor multiple UEs, a UE may detect an error pattern (e.g., an indicationof an error or adverse condition) in the received WUS based on aconfiguration for the WUS, and the UE may perform one or more mitigationoperations based on the detected error pattern. For example, when the UEdetects an error pattern, the UE may wake up, for example, its PCell andall SCells in a master cell group (MCG) (or a PSCell and all SCells in asecondary cell group (SCG)) as a mitigation operation. Additionally oralternatively, if the UE detects continuous error patterns in the WUS(e.g., the UE determines a number of error patterns that exceeds athreshold value), the UE may enter a radio link failure (RLF) procedureto re-establish a radio link with the base station or may release itsconnection with the base station.

In some examples, the detected error pattern may include a size of theWUS being smaller (or larger) than a configured size of the WUS, thesize of the WUS being smaller than (or equal to) a configured startingbit position in the WUS for the UE to monitor for corresponding wake upindications, a number of bits in the WUS for which SCells of the UE towake up being less than a number of SCell dormancy groups for the UE, awake up indication for the PCell or PSCell being ‘0’ (e.g., the UE is torefrain from waking up the PCell or PSCell) but at least one SCell isindicated to wake up, or a combination thereof. Subsequently, upondetecting one of these error patterns, the UE may turn on all cells fora subsequent awake period, may declare RLF, may release its connection,or may perform an additional mitigation operation, or any combinationthereof. Additionally or alternatively, the base station may transmitmultiple WUSs with different configurations (e.g., indicated bycorresponding different radio network temporary identifiers (RNTls)) toenable each of the remaining UEs to receive their corresponding wake upindications regardless of whether a previous configuration is used or areconfiguration is used.

Aspects of the disclosure are initially described in the context ofwireless communications systems. Additionally, aspects of the disclosureare illustrated through an additional wireless communications system, aflowchart, and a process flow. Aspects of the disclosure are furtherillustrated by and described with reference to apparatus diagrams,system diagrams, and flowcharts that relate to WUS error handling.

FIG. 1 illustrates an example of a wireless communications system 100that supports WUS error handling in accordance with aspects of thepresent disclosure. The wireless communications system 100 may includeone or more base stations 105, one or more UEs 115, and a core network130. In some examples, the wireless communications system 100 may be aLong Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, anLTE-A Pro network, or a New Radio (NR) network. In some examples, thewireless communications system 100 may support enhanced broadbandcommunications, ultra-reliable (e.g., mission critical) communications,low latency communications, communications with low-cost andlow-complexity devices, or any combination thereof.

The base stations 105 may be dispersed throughout a geographic area toform the wireless communications system 100 and may be devices indifferent forms or having different capabilities. The base stations 105and the UEs 115 may wirelessly communicate via one or more communicationlinks 125. Each base station 105 may provide a coverage area 110 overwhich the UEs 115 and the base station 105 may establish one or morecommunication links 125. The coverage area 110 may be an example of ageographic area over which a base station 105 and a UE 115 may supportthe communication of signals according to one or more radio accesstechnologies.

The UEs 115 may be dispersed throughout a coverage area 110 of thewireless communications system 100, and each UE 115 may be stationary,or mobile, or both at different times. The UEs 115 may be devices indifferent forms or having different capabilities. Some example UEs 115are illustrated in FIG. 1 . The UEs 115 described herein may be able tocommunicate with various types of devices, such as other UEs 115, thebase stations 105, or network equipment (e.g., core network nodes, relaydevices, integrated access and backhaul (IAB) nodes, or other networkequipment), as shown in FIG. 1 .

The base stations 105 may communicate with the core network 130, or withone another, or both. For example, the base stations 105 may interfacewith the core network 130 through one or more backhaul links 120 (e.g.,via an S1, N2, N3, or other interface). The base stations 105 maycommunicate with one another over the backhaul links 120 (e.g., via anX2, Xn, or other interface) either directly (e.g., directly between basestations 105), or indirectly (e.g., via core network 130), or both. Insome examples, the backhaul links 120 may be or include one or morewireless links.

One or more of the base stations 105 described herein may include or maybe referred to by a person having ordinary skill in the art as a basetransceiver station, a radio base station, an access point, a radiotransceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or agiga-NodeB (either of which may be referred to as a gNB), a Home NodeB,a Home eNodeB, or other suitable terminology.

A UE 115 may include or may be referred to as a mobile device, awireless device, a remote device, a handheld device, or a subscriberdevice, or some other suitable terminology, where the “device” may alsobe referred to as a unit, a station, a terminal, or a client, amongother examples. A UE 115 may also include or may be referred to as apersonal electronic device such as a cellular phone, a personal digitalassistant (PDA), a tablet computer, a laptop computer, or a personalcomputer. In some examples, a UE 115 may include or be referred to as awireless local loop (WLL) station, an Internet of Things (IoT) device,an Internet of Everything (IoE) device, or a machine type communications(MTC) device, among other examples, which may be implemented in variousobjects such as appliances, or vehicles, meters, among other examples.

The UEs 115 described herein may be able to communicate with varioustypes of devices, such as other UEs 115 that may sometimes act as relaysas well as the base stations 105 and the network equipment includingmacro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations,among other examples, as shown in FIG. 1 .

The UEs 115 and the base stations 105 may wirelessly communicate withone another via one or more communication links 125 over one or morecarriers. The term “carrier” may refer to a set of radio frequencyspectrum resources having a defined physical layer structure forsupporting the communication links 125. For example, a carrier used fora communication link 125 may include a portion of a radio frequencyspectrum band (e.g., a bandwidth part (BWP)) that is operated accordingto one or more physical layer channels for a given radio accesstechnology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layerchannel may carry acquisition signaling (e.g., synchronization signals,system information), control signaling that coordinates operation forthe carrier, user data, or other signaling. The wireless communicationssystem 100 may support communication with a UE 115 using carrieraggregation or multi-carrier operation. A UE 115 may be configured withmultiple downlink component carriers and one or more uplink componentcarriers according to a carrier aggregation configuration. Carrieraggregation may be used with both frequency division duplexing (FDD) andtime division duplexing (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), acarrier may also have acquisition signaling or control signaling thatcoordinates operations for other carriers. A carrier may be associatedwith a frequency channel (e.g., an evolved universal mobiletelecommunication system terrestrial radio access (E-UTRA) absoluteradio frequency channel number (EARFCN)) and may be positioned accordingto a channel raster for discovery by the UEs 115. A carrier may beoperated in a standalone mode where initial acquisition and connectionmay be conducted by the UEs 115 via the carrier, or the carrier may beoperated in a non-standalone mode where a connection is anchored using adifferent carrier (e.g., of the same or a different radio accesstechnology).

The communication links 125 shown in the wireless communications system100 may include uplink transmissions from a UE 115 to a base station105, or downlink transmissions from a base station 105 to a UE 115.Carriers may carry downlink or uplink communications (e.g., in an FDDmode) or may be configured to carry downlink and uplink communications(e.g., in a TDD mode).

A carrier may be associated with a particular bandwidth of the radiofrequency spectrum, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of determined bandwidths for carriers of a particular radioaccess technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz(MHz)). Devices of the wireless communications system 100 (e.g., thebase stations 105, the UEs 115, or both) may have hardwareconfigurations that support communications over a particular carrierbandwidth or may be configurable to support communications over one of aset of carrier bandwidths. In some examples, the wireless communicationssystem 100 may include base stations 105 or UEs 115 that supportsimultaneous communications via carriers associated with multiplecarrier bandwidths. In some examples, each served UE 115 may beconfigured for operating over portions (e.g., a sub-band, a BWP) or allof a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiplesubcarriers (e.g., using multi-carrier modulation (MCM) techniques suchas orthogonal frequency division multiplexing (OFDM) or discrete Fouriertransform spread OFDM (DFT-S-OFDM)). In a system employing MCMtechniques, a resource element may consist of one symbol period (e.g., aduration of one modulation symbol) and one subcarrier, where the symbolperiod and subcarrier spacing are inversely related. The number of bitscarried by each resource element may depend on the modulation scheme(e.g., the order of the modulation scheme, the coding rate of themodulation scheme, or both). Thus, the more resource elements that a UE115 receives and the higher the order of the modulation scheme, thehigher the data rate may be for the UE 115. A wireless communicationsresource may refer to a combination of a radio frequency spectrumresource, a time resource, and a spatial resource (e.g., spatial layersor beams), and the use of multiple spatial layers may further increasethe data rate or data integrity for communications with a UE 115.

One or more numerologies for a carrier may be supported, where anumerology may include a subcarrier spacing (Δf) and a cyclic prefix. Acarrier may be divided into one or more BWPs having the same ordifferent numerologies. In some examples, a UE 115 may be configuredwith multiple BWPs. In some examples, a single BWP for a carrier may beactive at a given time and communications for the UE 115 may berestricted to one or more active BWPs.

The time intervals for the base stations 105 or the UEs 115 may beexpressed in multiples of a basic time unit which may, for example,refer to a sampling period of T_(s) = 1/(Δf_(max) · N_(f)) seconds,where Δf_(max) may represent the maximum supported subcarrier spacing,and N_(f) may represent the maximum supported discrete Fourier transform(DFT) size. Time intervals of a communications resource may be organizedaccording to radio frames each having a specified duration (e.g., 10milliseconds (ms)). Each radio frame may be identified by a system framenumber (SFN) (e.g., ranging from 0 to 1023).

Each frame may include multiple consecutively numbered subframes orslots, and each subframe or slot may have the same duration. In someexamples, a frame may be divided (e.g., in the time domain) intosubframes, and each subframe may be further divided into a number ofslots. Alternatively, each frame may include a variable number of slots,and the number of slots may depend on subcarrier spacing. Each slot mayinclude a number of symbol periods (e.g., depending on the length of thecyclic prefix prepended to each symbol period). In some wirelesscommunications systems 100, a slot may further be divided into multiplemini-slots containing one or more symbols. Excluding the cyclic prefix,each symbol period may contain one or more (e.g., N_(f)) samplingperiods. The duration of a symbol period may depend on the subcarrierspacing or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallestscheduling unit (e.g., in the time domain) of the wirelesscommunications system 100 and may be referred to as a transmission timeinterval (TTI). In some examples, the TTI duration (e.g., the number ofsymbol periods in a TTI) may be variable. Additionally or alternatively,the smallest scheduling unit of the wireless communications system 100may be dynamically selected (e.g., in bursts of shortened TTIs (sTTls)).

Physical channels may be multiplexed on a carrier according to varioustechniques. A physical control channel and a physical data channel maybe multiplexed on a downlink carrier, for example, using one or more oftime division multiplexing (TDM) techniques, frequency divisionmultiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A controlregion (e.g., a control resource set (CORESET)) for a physical controlchannel may be defined by a number of symbol periods and may extendacross the system bandwidth or a subset of the system bandwidth of thecarrier. One or more control regions (e.g., CORESETs) may be configuredfor a set of the UEs 115. For example, one or more of the UEs 115 maymonitor or search control regions for control information according toone or more search space sets, and each search space set may include oneor multiple control channel candidates in one or more aggregation levelsarranged in a cascaded manner. An aggregation level for a controlchannel candidate may refer to a number of control channel resources(e.g., control channel elements (CCEs)) associated with encodedinformation for a control information format having a given payloadsize. Search space sets may include common search space sets configuredfor sending control information to multiple UEs 115 and UE-specificsearch space sets for sending control information to a specific UE 115.

Each base station 105 may provide communication coverage via one or morecells, for example a macro cell, a small cell, a hot spot, or othertypes of cells, or any combination thereof. The term “cell” may refer toa logical communication entity used for communication with a basestation 105 (e.g., over a carrier) and may be associated with anidentifier for distinguishing neighboring cells (e.g., a physical cellidentifier (PCID), a virtual cell identifier (VCID), or others). In someexamples, a cell may also refer to a geographic coverage area 110 or aportion of a geographic coverage area 110 (e.g., a sector) over whichthe logical communication entity operates. Such cells may range fromsmaller areas (e.g., a structure, a subset of structure) to larger areasdepending on various factors such as the capabilities of the basestation 105. For example, a cell may be or include a building, a subsetof a building, or exterior spaces between or overlapping with geographiccoverage areas 110, among other examples.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by theUEs 115 with service subscriptions with the network provider supportingthe macro cell. A small cell may be associated with a lower-powered basestation 105, as compared with a macro cell, and a small cell may operatein the same or different (e.g., licensed, unlicensed) frequency bands asmacro cells. Small cells may provide unrestricted access to the UEs 115with service subscriptions with the network provider or may providerestricted access to the UEs 115 having an association with the smallcell (e.g., the UEs 115 in a closed subscriber group (CSG), the UEs 115associated with users in a home or office). A base station 105 maysupport one or multiple cells and may also support communications overthe one or more cells using one or multiple component carriers.

In some examples, a carrier may support multiple cells, and differentcells may be configured according to different protocol types (e.g.,MTC, narrowband loT (NB-loT), enhanced mobile broadband (eMBB)) that mayprovide access for different types of devices.

In some examples, a base station 105 may be movable and thereforeprovide communication coverage for a moving geographic coverage area110. In some examples, different geographic coverage areas 110associated with different technologies may overlap, but the differentgeographic coverage areas 110 may be supported by the same base station105. In other examples, the overlapping geographic coverage areas 110associated with different technologies may be supported by differentbase stations 105. The wireless communications system 100 may include,for example, a heterogeneous network in which different types of thebase stations 105 provide coverage for various geographic coverage areas110 using the same or different radio access technologies.

The wireless communications system 100 may support synchronous orasynchronous operation. For synchronous operation, the base stations 105may have similar frame timings, and transmissions from different basestations 105 may be approximately aligned in time. For asynchronousoperation, the base stations 105 may have different frame timings, andtransmissions from different base stations 105 may, in some examples,not be aligned in time. The techniques described herein may be used foreither synchronous or asynchronous operations.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices and may provide for automated communication betweenmachines (e.g., via Machine-to-Machine (M2M) communication). M2Mcommunication or MTC may refer to data communication technologies thatallow devices to communicate with one another or a base station 105without human intervention. In some examples, M2M communication or MTCmay include communications from devices that integrate sensors or metersto measure or capture information and relay such information to acentral server or application program that makes use of the informationor presents the information to humans interacting with the applicationprogram. Some UEs 115 may be designed to collect information or enableautomated behavior of machines or other devices. Examples ofapplications for MTC devices include smart metering, inventorymonitoring, water level monitoring, equipment monitoring, healthcaremonitoring, wildlife monitoring, weather and geological eventmonitoring, fleet management and tracking, remote security sensing,physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reducepower consumption, such as half-duplex communications (e.g., a mode thatsupports one-way communication via transmission or reception, but nottransmission and reception simultaneously). In some examples,half-duplex communications may be performed at a reduced peak rate.Other power conservation techniques for the UEs 115 include entering apower saving deep sleep mode when not engaging in active communications,operating over a limited bandwidth (e.g., according to narrowbandcommunications), or a combination of these techniques. For example, someUEs 115 may be configured for operation using a narrowband protocol typethat is associated with a defined portion or range (e.g., set ofsubcarriers or resource blocks (RBs)) within a carrier, within aguard-band of a carrier, or outside of a carrier.

The wireless communications system 100 may be configured to supportultra-reliable communications or low-latency communications, or variouscombinations thereof. For example, the wireless communications system100 may be configured to support ultra-reliable low-latencycommunications (URLLC) or mission critical communications. The UEs 115may be designed to support ultra-reliable, low-latency, or criticalfunctions (e.g., mission critical functions). Ultra-reliablecommunications may include private communication or group communicationand may be supported by one or more mission critical services such asmission critical push-to-talk (MCPTT), mission critical video (MCVideo),or mission critical data (MCData). Support for mission criticalfunctions may include prioritization of services, and mission criticalservices may be used for public safety or general commercialapplications. The terms ultra-reliable, low-latency, mission critical,and ultra-reliable low-latency may be used interchangeably herein.

In some examples, a UE 115 may also be able to communicate directly withother UEs 115 over a device-to-device (D2D) communication link 135(e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115utilizing D2D communications may be within the geographic coverage area110 of a base station 105. Other UEs 115 in such a group may be outsidethe geographic coverage area 110 of a base station 105 or be otherwiseunable to receive transmissions from a base station 105. In someexamples, groups of the UEs 115 communicating via D2D communications mayutilize a one-to-many (1:M) system in which each UE 115 transmits toevery other UE 115 in the group. In some examples, a base station 105facilitates the scheduling of resources for D2D communications. In othercases, D2D communications are carried out between the UEs 115 withoutthe involvement of a base station 105.

In some systems, the D2D communication link 135 may be an example of acommunication channel, such as a sidelink communication channel, betweenvehicles (e.g., UEs 115). In some examples, vehicles may communicateusing vehicle-to-everything (V2X) communications, vehicle-to-vehicle(V2V) communications, or some combination of these. A vehicle may signalinformation related to traffic conditions, signal scheduling, weather,safety, emergencies, or any other information relevant to a V2X system.In some examples, vehicles in a V2X system may communicate with roadsideinfrastructure, such as roadside units, or with the network via one ormore network nodes (e.g., base stations 105) using vehicle-to-network(V2N) communications, or with both.

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC) or 5G core (5GC), which may include at leastone control plane entity that manages access and mobility (e.g., amobility management entity (MME), an access and mobility managementfunction (AMF)) and at least one user plane entity that routes packetsor interconnects to external networks (e.g., a serving gateway (S-GW), aPacket Data Network (PDN) gateway (P-GW), or a user plane function(UPF)). The control plane entity may manage non-access stratum (NAS)functions such as mobility, authentication, and bearer management forthe UEs 115 served by the base stations 105 associated with the corenetwork 130. User IP packets may be transferred through the user planeentity, which may provide IP address allocation as well as otherfunctions. The user plane entity may be connected to IP services 150 forone or more network operators. The IP services 150 may include access tothe Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or aPacket-Switched Streaming Service.

Some of the network devices, such as a base station 105, may includesubcomponents such as an access network entity 140, which may be anexample of an access node controller (ANC). Each access network entity140 may communicate with the UEs 115 through one or more other accessnetwork transmission entities 145, which may be referred to as radioheads, smart radio heads, or transmission/reception points (TRPs). Eachaccess network transmission entity 145 may include one or more antennapanels. In some configurations, various functions of each access networkentity 140 or base station 105 may be distributed across various networkdevices (e.g., radio heads and ANCs) or consolidated into a singlenetwork device (e.g., a base station 105).

The wireless communications system 100 may operate using one or morefrequency bands, typically in the range of 300 megahertz (MHz) to 300gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known asthe ultra-high frequency (UHF) region or decimeter band because thewavelengths range from approximately one decimeter to one meter inlength. The UHF waves may be blocked or redirected by buildings andenvironmental features, but the waves may penetrate structuressufficiently for a macro cell to provide service to the UEs 115 locatedindoors. The transmission of UHF waves may be associated with smallerantennas and shorter ranges (e.g., less than 100 kilometers) compared totransmission using the smaller frequencies and longer waves of the highfrequency (HF) or very high frequency (VHF) portion of the spectrumbelow 300 MHz.

The wireless communications system 100 may also operate in a super highfrequency (SHF) region using frequency bands from 3 GHz to 30 GHz, alsoknown as the centimeter band, or in an extremely high frequency (EHF)region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as themillimeter band. In some examples, the wireless communications system100 may support millimeter wave (mmW) communications between the UEs 115and the base stations 105, and EHF antennas of the respective devicesmay be smaller and more closely spaced than UHF antennas. In someexamples, this may facilitate use of antenna arrays within a device. Thepropagation of EHF transmissions, however, may be subject to evengreater atmospheric attenuation and shorter range than SHF or UHFtransmissions. The techniques disclosed herein may be employed acrosstransmissions that use one or more different frequency regions, anddesignated use of bands across these frequency regions may differ bycountry or regulating body.

The wireless communications system 100 may utilize both licensed andunlicensed radio frequency spectrum bands. For example, the wirelesscommunications system 100 may employ License Assisted Access (LAA),LTE-Unlicensed (LTE-U) radio access technology, or NR technology in anunlicensed band such as the 5 GHz industrial, scientific, and medical(ISM) band. When operating in unlicensed radio frequency spectrum bands,devices such as the base stations 105 and the UEs 115 may employ carriersensing for collision detection and avoidance. In some examples,operations in unlicensed bands may be based on a carrier aggregationconfiguration in conjunction with component carriers operating in alicensed band (e.g., LAA). Operations in unlicensed spectrum may includedownlink transmissions, uplink transmissions, P2P transmissions, or D2Dtransmissions, among other examples.

A base station 105 or a UE 115 may be equipped with multiple antennas,which may be used to employ techniques such as transmit diversity,receive diversity, multiple-input multiple-output (MIMO) communications,or beamforming. The antennas of a base station 105 or a UE 115 may belocated within one or more antenna arrays or antenna panels, which maysupport MIMO operations or transmit or receive beamforming. For example,one or more base station antennas or antenna arrays may be co-located atan antenna assembly, such as an antenna tower. In some examples,antennas or antenna arrays associated with a base station 105 may belocated in diverse geographic locations. A base station 105 may have anantenna array with a number of rows and columns of antenna ports thatthe base station 105 may use to support beamforming of communicationswith a UE 115. Likewise, a UE 115 may have one or more antenna arraysthat may support various MIMO or beamforming operations. Additionally oralternatively, an antenna panel may support radio frequency beamformingfor a signal transmitted via an antenna port.

The base stations 105 or the UEs 115 may use MIMO communications toexploit multipath signal propagation and increase the spectralefficiency by transmitting or receiving multiple signals via differentspatial layers. Such techniques may be referred to as spatialmultiplexing. The multiple signals may, for example, be transmitted bythe transmitting device via different antennas or different combinationsof antennas. Likewise, the multiple signals may be received by thereceiving device via different antennas or different combinations ofantennas. Each of the multiple signals may be referred to as a separatespatial stream and may carry bits associated with the same data stream(e.g., the same codeword) or different data streams (e.g., differentcodewords). Different spatial layers may be associated with differentantenna ports used for channel measurement and reporting. MIMOtechniques include single-user MIMO (SU-MIMO), where multiple spatiallayers are transmitted to the same receiving device, and multiple-userMIMO (MU-MIMO), where multiple spatial layers are transmitted tomultiple devices.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105, a UE 115) to shape or steeran antenna beam (e.g., a transmit beam, a receive beam) along a spatialpath between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that some signals propagatingat particular orientations with respect to an antenna array experienceconstructive interference while others experience destructiveinterference. The adjustment of signals communicated via the antennaelements may include a transmitting device or a receiving deviceapplying amplitude offsets, phase offsets, or both to signals carriedvia the antenna elements associated with the device. The adjustmentsassociated with each of the antenna elements may be defined by abeamforming weight set associated with a particular orientation (e.g.,with respect to the antenna array of the transmitting device orreceiving device, or with respect to some other orientation).

A base station 105 or a UE 115 may use beam sweeping techniques as partof beam forming operations. For example, a base station 105 may usemultiple antennas or antenna arrays (e.g., antenna panels) to conductbeamforming operations for directional communications with a UE 115.Some signals (e.g., synchronization signals, reference signals, beamselection signals, or other control signals) may be transmitted by abase station 105 multiple times in different directions. For example,the base station 105 may transmit a signal according to differentbeamforming weight sets associated with different directions oftransmission. Transmissions in different beam directions may be used toidentify (e.g., by a transmitting device, such as a base station 105, orby a receiving device, such as a UE 115) a beam direction for latertransmission or reception by the base station 105.

Some signals, such as data signals associated with a particularreceiving device, may be transmitted by a base station 105 in a singlebeam direction (e.g., a direction associated with the receiving device,such as a UE 115). In some examples, the beam direction associated withtransmissions along a single beam direction may be determined based on asignal that was transmitted in one or more beam directions. For example,a UE 115 may receive one or more of the signals transmitted by the basestation 105 in different directions and may report to the base station105 an indication of the signal that the UE 115 received with a highestsignal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station 105or a UE 115) may be performed using multiple beam directions, and thedevice may use a combination of digital precoding or radio frequencybeamforming to generate a combined beam for transmission (e.g., from abase station 105 to a UE 115). The UE 115 may report feedback thatindicates precoding weights for one or more beam directions, and thefeedback may correspond to a configured number of beams across a systembandwidth or one or more sub-bands. The base station 105 may transmit areference signal (e.g., a cell-specific reference signal (CRS), achannel state information reference signal (CSI-RS)), which may beprecoded or unprecoded. The UE 115 may provide feedback for beamselection, which may be a precoding matrix indicator (PMI) orcodebook-based feedback (e.g., a multi-panel type codebook, a linearcombination type codebook, a port selection type codebook). Althoughthese techniques are described with reference to signals transmitted inone or more directions by a base station 105, a UE 115 may employsimilar techniques for transmitting signals multiple times in differentdirections (e.g., for identifying a beam direction for subsequenttransmission or reception by the UE 115) or for transmitting a signal ina single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE 115) may try multiple receiveconfigurations (e.g., directional listening) when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets (e.g., differentdirectional listening weight sets) applied to signals received atmultiple antenna elements of an antenna array, or by processing receivedsignals according to different receive beamforming weight sets appliedto signals received at multiple antenna elements of an antenna array,any of which may be referred to as “listening” according to differentreceive configurations or receive directions. In some examples, areceiving device may use a single receive configuration to receive alonga single beam direction (e.g., when receiving a data signal). The singlereceive configuration may be aligned in a beam direction determinedbased on listening according to different receive configurationdirections (e.g., a beam direction determined to have a highest signalstrength, highest signal-to-noise ratio (SNR), or otherwise acceptablesignal quality based on listening according to multiple beamdirections).

The wireless communications system 100 may be a packet-based networkthat operates according to a layered protocol stack. In the user plane,communications at the bearer or Packet Data Convergence Protocol (PDCP)layer may be IP-based. A Radio Link Control (RLC) layer may performpacket segmentation and reassembly to communicate over logical channels.A Medium Access Control (MAC) layer may perform priority handling andmultiplexing of logical channels into transport channels. The MAC layermay also use error detection techniques, error correction techniques, orboth to support retransmissions at the MAC layer to improve linkefficiency. In the control plane, the Radio Resource Control (RRC)protocol layer may provide establishment, configuration, and maintenanceof an RRC connection between a UE 115 and a base station 105 or a corenetwork 130 supporting radio bearers for user plane data. At thephysical layer, transport channels may be mapped to physical channels.

The UEs 115 and the base stations 105 may support retransmissions ofdata to increase the likelihood that data is received successfully.Hybrid automatic repeat request (HARQ) feedback is one technique forincreasing the likelihood that data is received correctly over acommunication link 125. HARQ may include a combination of errordetection (e.g., using a cyclic redundancy check (CRC)), forward errorcorrection (FEC), and retransmission (e.g., automatic repeat request(ARQ)). HARQ may improve throughput at the MAC layer in poor radioconditions (e.g., low signal-to-noise conditions). In some examples, adevice may support same-slot HARQ feedback, where the device may provideHARQ feedback in a specific slot for data received in a previous symbolin the slot. In other cases, the device may provide HARQ feedback in asubsequent slot, or according to some other time interval.

In some wireless communications systems, a UE 115 may enter a DRX modeto, for example, conserve power usage at the UE 115. When a UE 115operates in a DRX mode, the UE 115 may transition between an activestate and an inactive state in a DRX cycle. When the UE 115 is in anactive DRX duration (e.g., active state), the UE 115 may be configuredto transmit and receive information, and when the UE 115 is in aninactive DRX duration (e.g., inactive state), the UE 115 may refrainfrom monitoring for signals from the base station and may also refrainfrom transmitting or receiving some types of information. In someexamples, a base station 105 may also enter a DRX mode to conserve powerusage at the base station 105.

Additionally, the UE 115 may use a connected DRX (CDRX) mode as part ofthe DRX mode. In some cases, CDRX may be defined per MAC-entity acrossCCs of a CA configuration. For example, CDRX may be defined for a firstMAC-entity that includes a master cell group (MCG) (e.g., a PCell andone or more SCells) and for a second MAC entity that includes asecondary cell group (SCG) (e.g., a PSCell and one or more SCells). Assuch, the CDRX may include different DRX configurations per MAC-entityof the UE 115. For example, the different DRX configurations may includespecific DRX cycles, on duration timers (e.g., drx-onDurationTimer),inactivity timers (e.g., drx-InactivityTimer), etc., that are defined assubcarrier spacing (SCS)-independent values (e.g., in ‘ms’).Additionally or alternatively, the UE 115 may use the CDRX mode withdual connectivity configurations.

In some cases, before the start of an on duration (e.g., onDuration) fora corresponding MAC-entity (e.g., MCG or SCG) of a DRX or CDRX mode, abase station 105 (e.g., or another network device) may transmit a WUS tosignal if UE(s) shall wake up in the next on duration (e.g., to receivecommunications from the base station 105, to transmit communications tothe base station 105, etc.). For example, the base station 105 maytransmit the WUS in a physical downlink control channel (PDCCH) using acorresponding downlink control information (DCI) format for the WUS(e.g., DCI Format 2_6) with a CRC scrambled by a power saving RNTI(PS-RNTI or PS_RNTI). If a wake-up indication in the WUS is toggled(e.g., Wake-up_indication bit = 1), the UE 115 may monitor a next onduration (e.g., to receive communications from the base station 105during the on duration). Additionally or alternatively, if the wake-upindication in the WUS is not toggled (e.g., Wake-up_indication bit = 0),the UE 115 may skip monitoring a next on duration (e.g., and stay in aninactive state). The base station 105 may transmit the WUS a configuredamount of time before the next on duration, where the UEs 115 receive anindication of this configured amount of time. For example, theconfigured amount of time may be referred to as an offset (e.g., a powersaving offset (ps-Offset) and may be in terms of slots, subframes,absolute time (e.g., in milliseconds), or another time unit.

In some examples, if a UE 115 cannot detect the WUS (e.g., an erroroccurs), the UE 115 may follow a power saving wake-up procedureindicated by an information element (IE) received from a base station105 via higher layer signaling (e.g., a ps_WakeUp IE in an RRCconfiguration from the base station 105). For example, if the IE is setto “TRUE” (e.g., ps_WakeUp = TRUE), then the UE 115 may still monitor anext on duration (e.g., even if the WUS is not detected). Additionallyor alternatively, if the IE is not set to “TRUE” or the base station 105does not transmit the higher layer signaling to the UE 115, if the WUSis not detected, the UE 115 may skip monitoring a next on duration. Ifthe UE 115 is configured for dual connectivity (e.g., E-UTRA-NR dualconnectivity (ENDC), NR-NR dual connectivity (NRDC), etc.), the basestation 105 may transmit the WUS in different cells for different cellgroups. For example, for an MCG, the base station 105 may transmit theWUS in a PCell (e.g., NR PCell). Additionally or alternatively, for anSCG, the base station 105 may transmit the WUS in a PSCell (e.g., NRPSCell).

Additionally, a base station 105 may transmit a WUS to one UE 115 or agroup of UEs 115 (e.g., a set of one or more UEs 115). When the WUS istransmitted to the group of UEs 115, the base station 105 may configuremultiple blocks in the WUS, where each UE 115 of the group of UEs 115may receive or may be configured with a subset (e.g., one) of the blocksof the WUS. Accordingly, to enable each UE 115 to receive and read acorresponding block of the WUS, the base station 105 may individuallyindicate a starting bit position of the WUS to each UE 115 thatcorresponds to a start of a respective block intended for each UE 115.In some examples, the base station 105 may configure and indicate thestarting bit position (e.g., in the DCI 2_6 message for the WUS) to eachUE 115 using an IE (e.g., a ps-PositionDCI-2-6 IE). Additionally, thebase station 105 may configure and indicate a total size of the WUS inan additional IE (e.g., sizeDCl-2-6 IE) to each UE 115. Table 1illustrates an example configuration for a WUS that includes threeblocks (e.g., for three UEs 115).

TABLE 1 WUS Configuration Field Size (Number of Bits) Block Number 1Wake-Up Indication 1 SCell Dormancy Indication 0-5 Block Number 2Wake-Up Indication 1 SCell Dormancy Indication 0-5 Block Number 3Wake-Up Indication 1 SCell Dormancy Indication 0-5

Each block of the WUS may include a first wake-up indication for aspecial cell (SpCell) for a corresponding UE 115 (e.g., the SpCell maybe a PCell for the MCG or a PSCell for the SCG). Accordingly, this firstwake-up indication may be one or more bits, such as a single bit, toindicate whether the UE 115 is to wake up the SpCell for a next onduration. Additionally, in some examples, the UE 115 may either wake upall SCells along with the SpCell (e.g., PCell or PSCell), or the basestation 105 may include an SCell dormancy indication in the WUS thatsignals a bitmap to indicate which SCell group the UE 115 is to wake upfor the next on duration. For example, the base station 105 mayconfigure a mapping between SCell to SCell group (e.g., dormancy group,SCell dormancy group, etc.) based on a parameter (e.g., DormancyGroupld)of the associated SCell index when configuring the SCell(s). In someexamples, the base station 105 may configure up to five (5) SCell groups(e.g., or a greater number of SCell groups), where each bit of an SCelldormancy indication in a corresponding block of the WUS may correspondto a separate SCell group (e.g., up to five (5) bits to indicate each ofthe up to five (5) SCell groups). A most significant bit (MSB) of theSCell dormancy indication may correspond to a first SCell group (e.g.,dormancy group identifier (ID) = 0). Additionally, an SCell group maycontain a single SCell or multiple SCells.

However, when a base station 105 transmits a WUS to multiple UEs 115,one or more UEs 115 of the multiple UEs 115 may have a connection withthe base station 105 released or may move to another cell (e.g., of thesame base station 105 or a different base station 105). Accordingly,based on the one or more UEs 115 no longer being connected to the basestation 105, the base station 105 may reconfigure the WUS for theremaining UEs 115 (e.g., impacted UEs 115) of the multiple UEs 115 minusthe one or more UEs 115, and the base station 105 may then send anupdated WUS based on the reconfiguring. However, in some examples, itmay be difficult to synchronize the change (e.g., reconfiguration) ofthe WUS when the WUS is transmitted to multiple UEs 115. Accordingly,one or more of the remaining UEs 115 may not receive the reconfiguration(e.g., due to radio link conditions, processing delays, network bugs,etc.) or may not reply with a reconfiguration complete message, but thebase station 105 may still transmit the WUS according to thereconfiguration (e.g., a new WUS format). For example, a UE 115 may notreceive the reconfiguration which changes its starting bit position forreading the WUS (e.g., from bit 8 to bit 4 of the WUS), leading the UE115 to receive a portion of the WUS not intended for it or for the UE115 to detect an error if the size of the WUS is smaller than theinitially configured starting bit position (e.g., the reconfigured WUSmay be equal to or less than 8 bits, but the UE 115 may still attempt tostart reading the WUS at the eighth bit, resulting in an error).

Wireless communications system 100 may support techniques for handlingWUS errors at a UE 115. For example, the UE 115 may detect an errorpattern when attempting to receive a WUS from a base station 105 basedon a configuration for receiving the WUS. Based on detecting the errorpattern, the UE 115 may then perform a mitigation operation based ondetermining the error pattern, such as waking up multiple cells toreceive a transmission in an on duration indicated by the WUS,transmitting an RLF indication to the base station (e.g., to release aconnection with the base station), etc. In some examples, the errorpattern may include a size of the WUS being different than the size ofthe WUS indicated in the configuration, the size of the WUS beingsmaller than or equal to the starting bit position for the UE 115 toread of the WUS indicated in the configuration, that a number of bitsfor an SCell dormancy indication in the WUS is different than a numberof dormancy groups for the UE 115, that the WUS indicates for the UE 115to not wake up an SpCell (e.g., PCell or PSCell) but for the UE 115 towake up one or more SCells, other conditions, or any combinationthereof. Additionally or alternatively, the base station 105 maytransmit multiple WUSs to at least some of the UE 115 and the additionalUEs 115, such as transmitting a first WUS according to the configurationand a second WUS according to a reconfiguration.

FIG. 2 illustrates an example of a wireless communications system 200that supports WUS error handling in accordance with aspects of thepresent disclosure. In some examples, wireless communications system 200may implement aspects of or may be implemented by aspects of wirelesscommunications system 100. For example, wireless communications system200 may include a base station 105-a, a first UE 115-a, a second UE115-b, and a third UE 115-c, which may represent examples ofcorresponding base stations 105 and UEs 115, respectively, as describedwith reference to FIG. 1 . Additionally, first UE 115-a, second UE115-b, and third UE 115-c may be configured to communicate with basestation 105-a on resources of a carrier 205 (e.g., or separate carriers)in a DRX mode (e.g., CDRX mode). Additionally, the UEs 115 may beconfigured to communicate with base station 105-a using a CAconfiguration, a dual connectivity configuration, or both, where atleast some of the UEs 115 if not each UE 115 may be further configuredwith an MCG (e.g., including a PCell and one or more SCells) and an SCG(e.g., including a PSCell and one or more SCells) for the communicationswith base station 105-a.

In some examples, the UEs 115 may be configured with the DRX mode to,for example, save battery power. As part of the DRX mode, the UEs 115may utilize a DRX cycle when communicating with base station 105-a thatincludes a periodic switching (e.g., on and off) of a receiver. DRXcycles may be configured in the downlink direction so that the UEs 115do not have to decode a PDCCH or do not have to receive physicaldownlink shared channel (PDSCH) transmissions in certain subframes. Insome cases, UE 115-a may monitor a wireless link continuously for anindication that UE 115-a is to receive data, which may expend batterypower. Accordingly (e.g., to conserve power and extend battery life),the UEs 115 may be configured with the DRX cycle (e.g., by base station105-a). The DRX cycle may consist of an on duration (e.g., an activetime, an active period, etc.) when the UEs 115 may monitor for controlinformation (e.g., on PDCCH) and a DRX period (e.g., sleep period,inactive time, etc.) when the UEs 115 may power down their radiocomponents. In some cases, the UEs 115 may be configured with a DRXshort cycle and a DRX long cycle. For example, the UEs 115 may enter aDRX long cycle if the UEs 115 are inactive for one or more DRX shortcycles. The transition between the DRX short cycle, the DRX long cycle,and continuous reception may be controlled by an internal timer or bymessaging from base station 105-a. In some examples, each UE 115 mayhave different DRX cycles, or base station 105-a may configure a commonDRX cycle for all UEs 115.

In some cases, the UEs 115 may monitor for and receive one or morescheduling messages on a PDCCH during the on duration(s). Whilemonitoring the PDCCH for a scheduling message, the UEs 115 may initiatea DRX inactivity timer (e.g., drx-InactivityTimer). If a schedulingmessage is successfully received, the UEs 115 may prepare to receivedata indicated by the scheduling message, and the DRX inactivity timermay be reset. When the DRX inactivity timer expires without receiving ascheduling message, the UEs 115 may transition to the DRX period (e.g.,become inactive). Additionally or alternatively, the UEs 115 may moveinto a DRX short cycle and may start a DRX short cycle timer. When theDRX short cycle timer expires, UE 115-a may resume a DRX long cycle.

Additionally, the DRX cycle may include a CDRX mode, where the UEs 115stay connected to base station 105-a during both the on durations (e.g.,awake durations) and the DRX periods (e.g., sleep periods). The CDRXmode may enable the UEs 115 to make signal-free transitions betweensleep and awake states (e.g., the DRX periods and on durations,respectively, or sleep and awake modes). Base station 105-a may schedulePDCCH/PDSCH transmissions during active times (e.g., awake states, ondurations, etc.). Additionally, the UEs 115 may monitor a PDCCH (i.e.,wake up or be awake) during the active times. In some cases, the activetimes may include when an on-duration timer is running, aninactive-timer is running, a scheduling request is pending, or acombination thereof. Except for the active times, the UEs 115 may sleepto save battery power while in the CDRX (or DRX) mode.

In some examples, before an on duration of a DRX cycle, base station105-a may transmit a WUS to the UEs 115 indicating which UEs 115 are towake up for the next on duration (e.g., and which cells of those UEs 115that are to wake up). For example, as described with reference to FIG. 1, base station 105-a may configure a WUS with multiple blocks, whereeach block is configured for a respective UE 115 of the UEs 115.Accordingly, base station 105-a may transmit a WUS configuration 210 tothe UEs 115 to indicate how each UE 115 should read and receive the WUS(e.g., using IEs indicating a starting bit location of the WUS for eachUE 115 to start reading the WUS, a total size of the WUS, etc.). Forexample, base station 105-a may configure a first block of the WUS forfirst UE 115-a, a second block of the WUS for second UE 115-b, and athird block of the WUS for third UE 115-c. Based on WUS configuration210, first UE 115-a may start reading the WUS at a bit corresponding tothe start of the first block, second UE 115-b may start reading the WUSat a bit corresponding to the start of the second block, and third UE115-c may start reading the WUS at a bit corresponding to the start ofthe third block.

As described herein, in some cases, one or more of the UEs 115 for whichthe WUS is configured (e.g., initially configured, previouslyconfigured) may have a connection with base station 105-a released ormay go to another cell (e.g., of the same base station 105 or adifferent base station 105). Based on the one or more UEs 115 no longerbeing connected to base station 105-a, base station 105-a mayreconfigure the WUS for the remaining UEs 115 (e.g., impacted UEs 115)of the multiple UEs 115 minus the one or more UEs 115 and may transmit aWUS reconfiguration 215 indicating the reconfiguring. For example, firstUE 115-a may have its connection to base station 105-a released ortransferred to another cell, such that the first block of the WUSconfigured for first UE 115-a may be removed with the reconfiguration.Subsequently, base station 105-a may then transmit the WUSreconfiguration 215 to second UE 115-b and third UE 115-c to indicatenew configuration information for those UEs 115 to receive thereconfigured WUS (e.g., updated starting bit positions in the WUS foreach UE 115 to start reading the reconfigured WUS, updated total size ofthe reconfigured WUS, etc.).

However, it may be difficult to synchronize the change (e.g.,reconfiguration) of the WUS when the WUS is transmitted to multiple UEs115. For example, one or more of the remaining UEs 115 may not receivethe reconfiguration (e.g., due to radio link conditions, processingdelays, network bugs, etc.) or may not reply with a reconfigurationcomplete message, but the base station 105 may still transmit the WUSaccording to the reconfiguration (e.g., a new WUS format). As anexample, third UE 115-c may not receive WUS reconfiguration 215 whichchanges its starting bit position for reading a WUS 220 (e.g., from bit8 to bit 4 of WUS 220), leading third UE 115-c to receive a portion ofWUS 220 not intended for it or for third UE 115-c to detect an error ifthe size of WUS 220 is smaller than the initially configured startingbit position (e.g., the reconfigured WUS may be equal to or less than 8bits, but third UE 115-c may still attempt to start reading WUS 220 atthe eighth bit, resulting in an error).

Using the techniques described herein, a UE 115 may detect one or moreerror patterns in one or more received WUSs (e.g., WUS 220) and mayperform one or more mitigation operations based on the detected errorpattern. For example, when there is a detected error pattern, the UE 115may wake up a PCell and all SCells in an MCG (e.g., or a PSCell and allSCells in an SCG) for a next on duration to potentially receive anytransmissions from base station 105-a. Additionally or alternatively, ifthere are continuous detected error patterns for the received WUS (e.g.,a number of consecutive error patterns are detected for consecutive WUSopportunities/receptions that satisfy or exceed a threshold value), theUE 115 may enter RLF to release a connection or link with base station105-a, which may include the UE 115 transmitting an RLF indication tobase station 105-a, and the UE 115 may then attempt to reestablish itslink with base station 105-a to see if the problem associated with theerror pattern(s) goes away. For example, the UE 115 may send areestablishment request to base station 105-a if the problem occurs inthe MCG, or the UE 115 may send SCG failure information for a first dualconnectivity configuration (e.g., NRDC) or NR SCG failure informationfor a second dual connectivity configuration (e.g., ENDC) if the problemoccurs in the SCG. If the problems persist, the UE 115 may release itsconnection with base station 105-a locally and may set up a connectionwith base station 105-a again to fix the problem.

In some examples, the error pattern may be one or more error patterns ofa set of possible error patterns for which the UE 115 monitors and maythen perform a corresponding one or more mitigation operations (e.g.,wake up all cells, report RLF, release connection, etc.). For example,the set of error patterns may include the UE 115 determining a size ofWUS 220 (e.g., a size of DCI Format 2_6 message carrying the WUS) issmaller than (or larger than) a size of the WUS indicated in a previousconfiguration (e.g., WUS configuration 210). Additionally oralternatively, the set of error patterns may include the UE 115determining the size of WUS 220 is smaller than (or equal to) a startingbit position configured for the UE 115 (e.g., indicated in WUSconfiguration 210). Additionally or alternatively, if the UE 115 isconfigured to monitor for or read a last block in the WUS, the set oferror patterns may include the UE 115 determining that the WUS includesfewer bits for an SCell dormancy indication (e.g., as discussed andshown with reference to Table 1) than a number of SCell dormancy groups(e.g., NrofDormancyGroups) configured for the UE 115. Additionally oralternatively, the set of error patterns may include the UE 115determining that a wake-up indication in the WUS (e.g., for an SpCell,such as the PCell or PSCell) is set to “0” (e.g., indicating that the UE115 should not wake up the SpCell for a next on duration) but at leastone bit in the SCell dormancy indication is set to “1” (e.g., indicatingfor the UE 115 to wake up one or more SCells or SCell groups). Forexample, the wake-up indication should be “1” if at least one bit in theSCell dormancy indication is set to “1,” such that if the wake-upindication is “0” and at least one bit in the SCell dormancy indicationis “1,” an error pattern is detected.

As shown in the example of FIG. 2 , base station 105-a may transmit aWUS to the UEs 115 before different on durations 225 of a DRX cycle toindicate which UEs 115 and which cells of those indicated UEs 115 shouldwake up for a next occurring on duration 225. For example, base station105-a may transmit a first WUS (e.g., WUS 1) before a first on duration225-a. This first WUS may include, for example, three (3) blocks: afirst block for first UE 115-a, a second block for second UE 115-b, anda third block for third UE 115-c. Each block may include, for example,four (4) bits (e.g., or a greater number of bits) for each UE 115, wherea first bit carries a wake-up indication (e.g., single bit) for thecorresponding UE 115 and the remaining three (3) bits carry an SCelldormancy indication indicating which SCells or SCell groups for the UE115 to wake up. Accordingly, based on each block containing, forexample, four (4) bits, base station 105-a may configure each UE 115with a corresponding starting bit location to read of the first WUS(e.g., a ps-PositionDCI-2-6 IE as part of WUS configuration 210), wherefirst UE 115-a is configured with a first starting bit location (e.g.,bit 0 of the first WUS, such that ps-PositionDCI-2-6 = 0 for first UE115-a), second UE 115-a is configured with a second starting bitlocation (e.g., bit 4 of the first WUS, such that ps-PositionDCl-2-6 = 4for second UE 115-b), and third UE 115-c is configured with a thirdstarting bit location (e.g., bit 8 of the first WUS, such thatps-PositionDCI-2-6 = 8 for third UE 115-c). Additionally, the first WUSmay include a total size of, for example, 12 bits based on the threeconfigured blocks (e.g., sizeDCl-2-6 = 12), where this total size isalso indicated to each UE 115.

For example, the first block of the first WUS may include a {1, 011}indication for first UE 115-a, which indicates for first UE 115-a towake up (e.g., wake up a PCell or PSCell) for first on duration 225-abased on the first “1” and for first UE 115-a to wake up a second andthird configured SCell dormancy group (e.g., or a second and thirdSCell) based on the “011.” Additionally, the second block of the firstWUS may include a {0, 000} indication for second UE 115-b, whichindicates for second UE 115-b to not wake up any cells for first onduration 225-a. Additionally, the third block of the first WUS mayinclude a {1, 111} indication for third UE 115-c, which indicates forthird UE 115-a to wake up for first on duration 225-a based on the first“1” and for third UE 115-c to wake up a first, second, and thirdconfigured SCell dormancy group based on the “111.”

Each UE 115 may monitor for and receive a corresponding block of thefirst WUS based on an initial or previously received WUS configuration(e.g., WUS configuration 210). Additionally, each UE 115 may monitor forand receive corresponding blocks of a second WUS (e.g., WUS 2) toindicate which UEs 115 (and which cells) should wake up for a second onduration 225-b based on the initial or previously received WUSconfiguration (e.g., using the respective previously configured startingbit locations). The second WUS may include same or different wake upindications as the first WUS.

Subsequently, during second on duration 225-b or after second onduration 225-b but before a third WUS transmission (e.g., WUS 3), firstUE 115-a may have its connection to base station 105-a released ortransferred to another cell. As such, the initial or previously receivedWUS configuration that includes the first block configured for first UE115-a may no longer be valid. Base station 105-a may then reconfigurethe WUS and transmit a reconfiguration (e.g., WUS reconfiguration 215)for the remaining UEs 115 (e.g., second UE 115-b and third UE 115-c) toreceive WUSs based on the reconfiguration. For example, thereconfiguration for the WUS may include two (2) blocks (e.g., a firstblock for second UE 115-b and a second block for third UE 115-c), asopposed to the three (3) blocks previously configured for the WUS.Accordingly, starting bit locations for each UE 115 and a total size ofthe WUS may change from the received configuration (e.g., theinitial/previously received configuration) to the reconfiguration forthe WUS. However, as described, it may be difficult to synchronize thisreconfiguration (e.g., change) for the WUS, such that one or both of theremaining UEs 115 do not receive the reconfiguration before a next WUStransmission.

For example, base station 105-a may transmit the third WUS to second UE115-b and third UE 115-c before a third on duration 225-c. However,since neither second UE 115-b nor third UE 115-c have not received thereconfiguration for the WUS, second UE 115-a and third UE 115-c may usethe initial/previously received configuration for the WUS whenattempting to receive a corresponding block in the WUS, while basestation 105-a uses the reconfiguration to transmit the third WUS. Thatis, second UE 115-b may attempt to start reading the third WUS startingat the second starting bit location (e.g., bit 4), and third UE 115-cmay attempt to start reading the third WUS starting at the thirdstarting bit location (e.g., bit 8). Based on the reconfiguration,though, base station 105-a may transmit a block intended for second UE115-b starting at bit 0 and may transmit a block intended for third UE115-c starting at bit 4. As such, since second UE 115-b attempts tostart reading the WUS at bit 4, second UE 115-b may receive wake-upindications intended for third UE 115-c, and third UE 115-c may detectan error if there is no bit 8 in the third WUS.

Rather than having these potential issues, based on the techniquesdescribed herein, at least one of if not both of second UE 115-b andthird UE 115-c may determine an error pattern occurs when receiving thethird WUS. For example, with the first block removed from theinitial/previously received WUS configuration in comparison to thereconfiguration, a total size of the third WUS may be different (e.g.,smaller) than an expected total size of the WUS indicated in theinitial/previously received WUS configuration. Accordingly, second UE115-b and third UE 115-c may detect this discrepancy as an error patternand may perform a mitigation operation (e.g., wake up all cells of theMCG or SCG or both) for third on duration 225-c so that second UE 115-band third UE 115-c have increased chances of receiving any downlinktransmissions intended for them during third on duration 225-c eventhough neither UE 115 successfully received a corresponding wake-upindication for themselves in the third WUS. Additionally oralternatively, third UE 115-c may determine the size of the third WUS(e.g., eight (8) bits) is smaller than (or equal to) a starting bitposition configured for third UE 115-c (e.g., bit 8).

In some examples, during third on duration 225-c, second UE 115-b mayreceive the reconfiguration (e.g., reconfiguration 1) for receivingsubsequent WUSs, where the reconfiguration configures second UE 115-bwith an updated starting bit location (e.g., bit 0) to read of a WUS andan updated total WUS size (e.g., eight (8) total bits). Subsequently,second UE 115-b may apply the reconfiguration when receiving a fourthWUS (e.g., WUS 4). For example, the fourth WUS may include a first blockwith a {1, 000} indication for second UE 115-b and a second block with a{1, 111} indication for third UE 115-c. Accordingly, using thereconfiguration, second UE 115-b may receive the first block with the{1, 000} indication in the fourth WUS and may wake up its SpCell (e.g.,PCell or PSCell) for a fourth on duration 225-d. However, third UE 115-cmay still attempt to read the fourth WUS starting at bit 8, which maylead to errors if the total size of the fourth WUS is eight (8) bitstotal. As such, third UE 115-c may perform a mitigation operation again(e.g., wake up all cells of the MCG or SCG or both, report RLF, etc.)based on detecting an error pattern for the fourth WUS. For example,third UE 115-c may determine the total size of the fourth WUS is stilldifferent than an expected total size indicated in theinitial/previously received WUS configuration (e.g., 12 bits) or maydetermine the size of the fourth WUS (e.g., eight (8) bits) is smallerthan (or equal to) a starting bit position configured for third UE 115-c(e.g., bit 8).

Subsequently, during fourth on duration 225-d, third UE 115-c mayreceive the reconfiguration (e.g., reconfiguration 2) for receivingsubsequent WUSs, where the reconfiguration configures third UE 115-cwith an updated starting bit location (e.g., bit 4) to read of a WUS andan updated total WUS size (e.g., eight (8) total bits). Accordingly,both second UE 115-b and third UE 115-c may apply the reconfigurationwhen receiving a fifth WUS (e.g., WUS 5) before a fifth on duration225-e and may read the fifth WUS properly to wake up indicated cells forthe fifth on duration 225-e. When second UE 115-b receives thereconfiguration (e.g., during third on duration 225-c) and when third UE115-c receives the reconfiguration (e.g., during fourth on duration225-d), both UEs 115 may transmit a reconfiguration complete message(e.g., RRCReconfigurationComplete message) to base station 105-a toindicate successful reception of the reconfiguration.

Additionally or alternatively, during a transition time fortransitioning from the initial/previously received WUS configuration tothe reconfiguration, base station 105-a may transmit duplicated wake upindications for impacted UEs 115 (e.g., second UE 115-b and third UE115-c) in multiple WUSs using the initial/previously received WUSconfiguration and the reconfiguration. For example, for the third WUSand the fourth WUS, based on one or both UEs 115 not having received thereconfiguration, base station 105-a may transmit two (2) WUSs at eachinstance to second UE 115-b and third UE 115-c, where a first WUS of thetwo (2) WUSs is transmitted according to the initial/previously receivedWUS configuration and a second WUS of the two (2) WUSs is transmittedaccording to the reconfiguration.

Accordingly, second UE 115-b and third UE 115-c may use a correspondingconfiguration or reconfiguration based on whichconfiguration/reconfiguration was last received. For example, for thethird WUS, both second UE 115-b and third UE 115-c may use theinitial/previously received WUS configuration to receive the first WUSof the two (2) WUSs because neither UE 115 has received thereconfiguration yet. For the fourth WUS, second UE 115-b may use thereconfiguration to receive the second WUS of the two (2) WUSs, and thirdUE 115-c may use the initial/previously received WUS configuration toreceive the first WUS of the two (2) WUSs based on third UE 115-c stillnot receiving the reconfiguration. For the fifth WUS, both second UE115-b and third UE 115-c may use the reconfiguration to receive thefifth WUS. Base station 105-a may stop sending WUSs according to theinitial/previously transmitted WUS configuration after receivingreconfiguration complete messages from all impacted UEs 115 (e.g.,second UE 115-b and third UE 115-c in the example of FIG. 2 ).

To differentiate which WUS is transmitted according to theinitial/previously received WUS configuration and which WUS istransmitted according to the reconfiguration, base station 105-a may usedifferent RNTIs (e.g., PS-RNTIs, PS_RNTIs, etc.) for each WUS. Forexample, the initial/previously received WUS configuration may includean indication of a first RNTI that is used to scramble a CRC (e.g., afirst CRC) of WUSs transmitted according to the initial/previouslyreceived WUS configuration. Additionally, the reconfiguration mayinclude an indication of a second RNTI that is used to scramble a CRC(e.g., a second CRC) of WUSs transmitted according to thereconfiguration. Accordingly, based on which configuration orreconfiguration that is most recently received at a UE 115, the UE 115may determine which WUS to monitor for and receive based on which WUSincludes the corresponding RNTI from the configuration orreconfiguration. For example, if the UE 115 most recently received theinitial/previous WUS configuration, the UE 115 may monitor for andreceive a WUS that uses the first RNTI to scramble its CRC. Additionallyor alternatively, if the UE 115 most recently received thereconfiguration, the UE 115 may monitor for and receive a WUS that usesthe second RNTI to scramble its CRC. Using the different RNTI values maysupport WUS error handling for multiple UEs 115 with differentconfiguration update times.

While three (3) UEs 115 are described and shown in the example of FIG. 2, it is to be understood that a greater number or fewer UEs 115 may beconfigured to receive WUSs from base station 105-a and detect errorpatterns as described herein.

FIG. 3 illustrates an example of a flowchart 300 in accordance withaspects of the present disclosure. In some examples, flowchart 300 mayimplement aspects of or may be implemented by aspects of wirelesscommunications system 100, wireless communications system 200, or both.For example, a UE 115 may perform an operation based on flowchart 300 tosupport communications with an additional device (e.g., a base station105).

The UE 115 may be configured to operate according to a CDRX mode asdescribed with reference to FIGS. 1 and 2 . For example, the CDRX modemay include a DRX or CDRX cycle for communicating with the additionaldevice that includes a periodic switching (e.g., on and off) of areceiver. The UE 115 may switch on the receiver during CDRX on durations(e.g., active times, active states, etc.) to enable communications withthe additional device and may switch off the receiver during remainingportions of the DRX/CDRX cycle (e.g., inactive times, inactive states,sleep durations, etc.). Additionally, before a CDRX on duration, theadditional device may transit a WUS to the UE 115 to indicate whetherthe UE 115 shall wake up for a next CDRX on duration or not. In someexamples, the additional device may transmit the WUS to the UE 115according to an offset value (e.g., slots, subframes, milliseconds,etc.) before a start of the CDRX on duration. The additional device mayconfigure this offset and indicate the offset to the UE 115.

The UE 115 may perform operations of flowchart 300 to determine whetherto wake up or not for a CDRX on duration after receiving or detecting aWUS. For example, at 305, the UE 115 may determine whether a WUS isdetected or not (e.g., regardless of whether it was successfullyreceived). If a WUS is detected, the UE 115 may proceed to 310, wherethe UE 115 determines whether a wake-up indication in the WUS is toggledor not. For example, as described with reference to FIGS. 1-2 and Table1, the WUS may include multiple bits intended for the UE 115 (e.g., in aconfigured block of the WUS), where the multiple bits include a firstbit for the wake-up indication (e.g., indicating to wake up a PCell orPSCell) and one or more additional bits for an indication of which SCelldormancy groups to wake up for the next CDRX on duration. If the wake-upindication is toggled (e.g., wake-up indication = 1 or WU_Ind = 1), theUE 115 may proceed to 320 and may start the next CDRX on duration (e.g.,waking up the cells indicated in the WUS) to monitor for communicationsfrom the additional device. Alternatively, if the indication is nottoggled (e.g., wake-up indication = 0 or WU_Ind = 0), the UE 115 mayproceed to 325 and not start the next CDRX on duration (e.g., the UE 115may remain in an inactive or sleep state).

Additionally or alternatively, at 305, if the WUS is not detected norreceived, the UE 115 may proceed to 315, where the UE 115 determineswhether an additional wake-up procedure (e.g., ps_WakeUp) has beenconfigured for the UE 115 (e.g., via RRC signaling). If the additionalwake-up procedure has been configured and is set to a value, such as“TRUE,” the UE 115 may proceed to 320 and may start the next CDRX onduration to monitor for communications from the additional device.Alternatively, if the additional wake-up procedure has not beenconfigured or is set to a different value than “TRUE” (e.g., set to“FALSE”), the UE 115 may proceed to 325 and not start the next CDRX onduration (e.g., the UE 115 may remain in an inactive or sleep state).

As described herein, the UE 115 may perform an additional operationafter 305 when receiving a WUS to detect an error pattern for thereceived or detected WUS. For example, the error pattern may include oneof the set of error patterns as described with reference to FIG. 2 . Ifthe error pattern has been detected, the UE 115 may perform a mitigationoperation as described with reference to FIG. 1 . Alternatively, if noerror pattern is detected, the UE 115 may proceed to 310 and perform anysubsequent operations as described previously. The error detectionoperation may prevent the UE 115 from reading wrong information in theWUS, while still enabling the mitigation operations to increase chancesthat transmissions intended for the UE 115 are successfully receivedduring the next CDRX on duration.

FIG. 4 illustrates an example of a process flow 400 that supports WUSerror handling in accordance with aspects of the present disclosure. Insome examples, process flow 400 may implement aspects of or may beimplemented by aspects of wireless communications system 100, wirelesscommunications system 200, or both. For example, process flow 400 mayinclude a base station 105-b and a UE 115-d, which may representexamples of corresponding base stations 105 and UEs 115, respectively,as described with reference to FIGS. 1-3 .

In the following description of process flow 400, the operations betweenUE 115-d and base station 105-b may be performed in different orders orat different times. Certain operations may also be left out of processflow 400, or other operations may be added to process flow 400. It is tobe understood that while UE 115-d and base station 105-b are shownperforming a number of the operations of process flow 400, any wirelessdevice may perform the operations shown.

At 405, base station 105-b may transmit, to a set of UEs 115 (e.g.,including UE 115-d), a configuration for receiving a WUS transmissionfor the set of UEs 115, the configuration may include a size of the WUStransmission and respective starting bit positions of the WUStransmission for each UE 115 of the set of UEs 115 to read. For example,UE 115-d may receive, from base station 105-b, the configuration forreceiving the WUS transmission, the configuration including the size ofthe WUS transmission and a first starting bit position of the WUStransmission for UE 115-d to read. In some examples, the configurationfor the WUS transmission may further include an indication of a firstPS-RNTI with which a CRC of the WUS is scrambled.

At 410, base station 105-b may determine that at least one UE 115 of theset of UEs 115 is no longer connected to base station 105-b and maydetermine that a subset of the set of UEs 115 different than the atleast one UE 115 (e.g., the subset of the set of UEs 115 does notinclude the at least one UE 115) are connected to base station 105-b.

At 415, base station 105-b may transmit, to the subset of the set of UEs115 (e.g., including UE 115-d), a reconfiguration message for receivingthe WUS transmission based on determining that the at least one UE 115is no longer connected to base station 105-b. For example, UE 115-d mayreceive the reconfiguration message for the WUS transmission, where thereconfiguration message includes a second size of the WUS transmissiondifferent than the size of the WUS transmission, includes a secondstarting bit position for UE 115-d to read of the WUS transmissiondifferent than the first starting bit position, or both. In someexamples, the reconfiguration message may further include an indicationof a second PS-RNTI with which a CRC of the WUS transmission isscrambled.

In some examples, at 420, UE 115-d may transmit, to base station 105-b,a reconfiguration complete message indicating successful reception ofthe reconfiguration message. For example, base station 105-b may receivethe reconfiguration complete message (e.g., indicating successfulreception of the reconfiguration message) from each UE 115 of the subsetof the set of UEs 115. Based on receiving the reconfiguration completemessage from each UE 115 of the subset of the set of UEs 115, basestation 105-b may refrain from transmitting a subsequent WUS accordingto the configuration for the WUS transmission. at 405

At 425, base station 105-b may transmit, to the subset of the set of UEs115, a WUS based on the reconfiguration message. For example, UE 115-dmay receive the WUS indicating for UE 115-d to wake up one or more cellsto receive a transmission from base station based on a configured offsetbetween receiving the WUS and receiving the transmission. In someexamples, the WUS may be transmitted according to the reconfigurationmessage based on receiving the reconfiguration complete message fromeach UE 115 of the subset of the set of UEs 115. However, in someimplementations, when receiving the WUS, UE 115-d may apply theconfiguration for the WUS transmission received at 405 rather thanapplying a reconfiguration for the WUS transmission received with thereconfiguration message, which may lead to issues for UE 115-d receivingthe WUS properly and successfully. For example, by using theconfiguration rather than the reconfiguration, UE 115-d may read the WUSfrom a different starting bit position than a starting bit positionintended for UE 115-d (e.g., causing an error pattern).

At 430, UE 115-d may receive, from base station 105-b, a second WUSbased on the reconfiguration message. In some examples, UE 115-d mayreceive the second WUS based on transmitting the reconfigurationcomplete message.

For example, at 425, base station 105-b may transmit, to the subset ofthe set of UEs 115, a first WUS according to the configuration for theWUS transmission, where a first CRC of the first WUS is scrambled withthe first PS-RNTI included in the configuration for the WUStransmission. In some examples, UE 115-d may receive the first WUS basedon the first CRC of the WUS being scrambled with the first PS-RNTI.Additionally or alternatively, at 430, base station 105-b may transmit,to the subset of the set of UEs 115, a second WUS according to areconfiguration in the reconfiguration message for the WUS transmission,where a second CRC is scrambled with a second PS-RNTI included in thereconfiguration message for the WUS transmission. For example, UE 115-dmay receive, from base station 105-b, the second WUS with the second CRCscrambled with the second PS-RNTI, where the second WUS indicates for UE115-d to wake up one or more additional cells to receive thetransmission from base station 105-b.

In some examples, UE 115-d may wake up the one or more cells indicatedby the WUS based on the configuration for the WUS transmission includingthe indication of the first PS-RNTI. Additionally or alternatively, UE115-d may wake up the one or more additional cells indicated by thesecond WUS based on receiving the reconfiguration message including theindication of the second PS-RNTI.

At 435, UE 115-d may determine that at least one error pattern of a setof error patterns occurs for the received WUS (e.g., the first WUS, thesecond WUS, or both). For example, UE 115-d may determine that a size ofthe WUS is different than the size of the WUS transmission indicated inthe configuration, that the size of the WUS is smaller than or equal tothe starting bit position for UE 115-d to read of the WUS transmissionindicated in the configuration, that a number of bits for an SCelldormancy indication in the WUS is different than a number of dormancygroups for UE 115-d, that the WUS indicates for UE 115-d to not wake upa PCell and for UE 115-d to wake up one or more SCells, or anycombination thereof.

At 440, UE 115-d may perform a mitigation operation based on determiningthe at least one error pattern. For example, at 440-a, UE 115-d may wakeup a set of cells to receive the transmission indicated by the WUS basedon determining the at least one error pattern. In some examples, the setof cells may include a PCell of an MCG, one or more SCells of the MCG, aPSCell of an SCG, one or more SCells of the SCG, or any combinationthereof.

Additionally or alternatively, at 440-b, UE 115-d may transmit, to basestation 105-b, an RLF indication to release a connection with basestation 105-b based on determining the at least one error pattern.Subsequently, UE 115-d may attempt to reestablish the connection withbase station 105-b based on transmitting the RLF indication. Forexample, UE 115-d may send a reestablishment request to base station105-b if the problem occurs in the MCG, or UE 115-d may send SCG failureinformation for a first dual connectivity configuration (e.g., NRDC) orNR SCG failure information for a second dual connectivity configuration(e.g., ENDC) if the problem occurs in the SCG. In some examples, UE115-d may determine to transmit the RLF indication based on determiningthat a number of error patterns for receiving the WUS transmissionaccording to the configuration occur, where the number of error patternssatisfies a threshold value.

FIG. 5 shows a block diagram 500 of a device 505 that supports WUS errorhandling in accordance with aspects of the present disclosure. Thedevice 505 may be an example of aspects of a UE 115 as described herein.The device 505 may include a receiver 510, a transmitter 515, and acommunications manager 520. The device 505 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 510 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to WUS error handling).Information may be passed on to other components of the device 505. Thereceiver 510 may utilize a single antenna or a set of multiple antennas.

The transmitter 515 may provide a means for transmitting signalsgenerated by other components of the device 505. For example, thetransmitter 515 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to WUS error handling). In some examples, thetransmitter 515 may be co-located with a receiver 510 in a transceivermodule. The transmitter 515 may utilize a single antenna or a set ofmultiple antennas.

The communications manager 520, the receiver 510, the transmitter 515,or various combinations thereof or various components thereof may beexamples of means for performing various aspects of WUS error handlingas described herein. For example, the communications manager 520, thereceiver 510, the transmitter 515, or various combinations or componentsthereof may support a method for performing one or more of the functionsdescribed herein.

In some examples, the communications manager 520, the receiver 510, thetransmitter 515, or various combinations or components thereof may beimplemented in hardware (e.g., in communications management circuitry).The hardware may include a processor, a digital signal processor (DSP),an application-specific integrated circuit (ASIC), a field-programmablegate array (FPGA) or other programmable logic device, a discrete gate ortransistor logic, discrete hardware components, or any combinationthereof configured as or otherwise supporting a means for performing thefunctions described in the present disclosure. In some examples, aprocessor and memory coupled with the processor may be configured toperform one or more of the functions described herein (e.g., byexecuting, by the processor, instructions stored in the memory).

Additionally or alternatively, in some examples, the communicationsmanager 520, the receiver 510, the transmitter 515, or variouscombinations or components thereof may be implemented in code (e.g., ascommunications management software or firmware) executed by a processor.If implemented in code executed by a processor, the functions of thecommunications manager 520, the receiver 510, the transmitter 515, orvarious combinations or components thereof may be performed by ageneral-purpose processor, a DSP, a central processing unit (CPU), anASIC, an FPGA, or any combination of these or other programmable logicdevices (e.g., configured as or otherwise supporting a means forperforming the functions described in the present disclosure).

In some examples, the communications manager 520 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the receiver 510, the transmitter515, or both. For example, the communications manager 520 may receiveinformation from the receiver 510, send information to the transmitter515, or be integrated in combination with the receiver 510, thetransmitter 515, or both to receive information, transmit information,or perform various other operations as described herein.

The communications manager 520 may support wireless communications at aUE in accordance with examples as disclosed herein. For example, thecommunications manager 520 may be configured as or otherwise support ameans for receiving, from a base station, a configuration for receivinga WUS transmission for a set of multiple UEs including the UE, theconfiguration including a size of the WUS transmission and a firststarting bit position of the WUS transmission for the UE to read. Thecommunications manager 520 may be configured as or otherwise support ameans for receiving, from the base station based on the configurationfor the WUS transmission, a WUS indicating for the UE to wake up one ormore cells to receive a transmission from the base station based on aconfigured offset between receiving the WUS and receiving thetransmission. The communications manager 520 may be configured as orotherwise support a means for determining that at least one errorpattern of a set of multiple error patterns occurs for the received WUS.The communications manager 520 may be configured as or otherwise supporta means for performing a mitigation operation based on determining theat least one error pattern.

By including or configuring the communications manager 520 in accordancewith examples as described herein, the device 505 (e.g., a processorcontrolling or otherwise coupled to the receiver 510, the transmitter515, the communications manager 520, or a combination thereof) maysupport techniques for increased reliability for receivingcommunications from an additional device. For example, based ondetecting an error pattern for a WUS and performing a mitigationoperation, the device 505 may increase chances that a transmission in anon duration indicated by the WUS is successfully received, therebyincreasing reliability.

FIG. 6 shows a block diagram 600 of a device 605 that supports WUS errorhandling in accordance with aspects of the present disclosure. Thedevice 605 may be an example of aspects of a device 505 or a UE 115 asdescribed herein. The device 605 may include a receiver 610, atransmitter 615, and a communications manager 620. The device 605 mayalso include a processor. Each of these components may be incommunication with one another (e.g., via one or more buses).

The receiver 610 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to WUS error handling).Information may be passed on to other components of the device 605. Thereceiver 610 may utilize a single antenna or a set of multiple antennas.

The transmitter 615 may provide a means for transmitting signalsgenerated by other components of the device 605. For example, thetransmitter 615 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to WUS error handling). In some examples, thetransmitter 615 may be co-located with a receiver 610 in a transceivermodule. The transmitter 615 may utilize a single antenna or a set ofmultiple antennas.

The device 605, or various components thereof, may be an example ofmeans for performing various aspects of WUS error handling as describedherein. For example, the communications manager 620 may include a WUSconfiguration component 625, a WUS reception component 630, an errorpatter determination component 635, an error pattern mitigationcomponent 640, or any combination thereof. The communications manager620 may be an example of aspects of a communications manager 520 asdescribed herein. In some examples, the communications manager 620, orvarious components thereof, may be configured to perform variousoperations (e.g., receiving, monitoring, transmitting) using orotherwise in cooperation with the receiver 610, the transmitter 615, orboth. For example, the communications manager 620 may receiveinformation from the receiver 610, send information to the transmitter615, or be integrated in combination with the receiver 610, thetransmitter 615, or both to receive information, transmit information,or perform various other operations as described herein.

The communications manager 620 may support wireless communications at aUE in accordance with examples as disclosed herein. The WUSconfiguration component 625 may be configured as or otherwise support ameans for receiving, from a base station, a configuration for receivinga WUS transmission for a set of multiple UEs including the UE, theconfiguration including a size of the WUS transmission and a firststarting bit position of the WUS transmission for the UE to read. TheWUS reception component 630 may be configured as or otherwise support ameans for receiving, from the base station based on the configurationfor the WUS transmission, a WUS indicating for the UE to wake up one ormore cells to receive a transmission from the base station based on aconfigured offset between receiving the WUS and receiving thetransmission. The error patter determination component 635 may beconfigured as or otherwise support a means for determining that at leastone error pattern of a set of multiple error patterns occurs for thereceived WUS. The error pattern mitigation component 640 may beconfigured as or otherwise support a means for performing a mitigationoperation based on determining the at least one error pattern.

FIG. 7 shows a block diagram 700 of a communications manager 720 thatsupports WUS error handling in accordance with aspects of the presentdisclosure. The communications manager 720 may be an example of aspectsof a communications manager 520, a communications manager 620, or both,as described herein. The communications manager 720, or variouscomponents thereof, may be an example of means for performing variousaspects of WUS error handling as described herein. For example, thecommunications manager 720 may include a WUS configuration component725, a WUS reception component 730, an error patter determinationcomponent 735, an error pattern mitigation component 740, a cell wake upcomponent 745, an RLF component 750, a reconfiguration component 755, amulti-WUS component 760, or any combination thereof. Each of thesecomponents may communicate, directly or indirectly, with one another(e.g., via one or more buses).

The communications manager 720 may support wireless communications at aUE in accordance with examples as disclosed herein. The WUSconfiguration component 725 may be configured as or otherwise support ameans for receiving, from a base station, a configuration for receivinga WUS transmission for a set of multiple UEs including the UE, theconfiguration including a size of the WUS transmission and a firststarting bit position of the WUS transmission for the UE to read. TheWUS reception component 730 may be configured as or otherwise support ameans for receiving, from the base station based on the configurationfor the WUS transmission, a WUS indicating for the UE to wake up one ormore cells to receive a transmission from the base station based on aconfigured offset between receiving the WUS and receiving thetransmission. The error patter determination component 735 may beconfigured as or otherwise support a means for determining that at leastone error pattern of a set of multiple error patterns occurs for thereceived WUS. The error pattern mitigation component 740 may beconfigured as or otherwise support a means for performing a mitigationoperation based on determining the at least one error pattern.

In some examples, to support performing the mitigation operation, thecell wake up component 745 may be configured as or otherwise support ameans for waking up a set of multiple cells to receive the transmissionindicated by the WUS based on determining the at least one errorpattern. In some examples, the set of multiple cells may include a PCellof an MCG, one or more SCells of the MCG, a PSCell of an SCG, one ormore SCells of the SCG, or any combination thereof.

In some examples, to support performing the mitigation operation, theRLF component 750 may be configured as or otherwise support a means fortransmitting, to the base station, an RLF indication to release aconnection with the base station based on determining the at least oneerror pattern. In some examples, to support performing the mitigationoperation, the RLF component 750 may be configured as or otherwisesupport a means for attempting to reestablish the connection with thebase station based on transmitting the RLF indication. In some examples,the RLF component 750 may be configured as or otherwise support a meansfor determining to transmit the RLF indication based on determining thata number of error patterns for receiving the WUS transmission accordingto the configuration occur, where the number of error patterns satisfiesa threshold value.

In some examples, the reconfiguration component 755 may be configured asor otherwise support a means for receiving, from the base station, areconfiguration message for the WUS transmission, the reconfigurationmessage including a second size of the WUS transmission different thanthe size of the WUS transmission, including a second starting bitposition for the UE to read of the WUS transmission different than thefirst starting bit position, or both. In some examples, thereconfiguration component 755 may be configured as or otherwise supporta means for receiving, from the base station, a second WUS based on thereconfiguration message. In some examples, the reconfiguration component755 may be configured as or otherwise support a means for transmitting,to the base station, a reconfiguration complete message indicatingsuccessful reception of the reconfiguration message, where the secondWUS is received based on transmitting the reconfiguration completemessage.

In some examples, the configuration for the WUS transmission furtherincludes an indication of a first PS-RNTI with which a CRC of the WUS isscrambled, and the multi-WUS component 760 may be configured as orotherwise support a means for receiving the WUS based on the CRC of theWUS being scrambled with the first PS-RNTI. Additionally, the multi-WUScomponent 760 may be configured as or otherwise support a means forreceiving, from the base station, a second WUS with a CRC scrambled witha second PS-RNTI, the second WUS indicating for the UE to wake up one ormore additional cells to receive the transmission from the base station.

In some examples, the multi-WUS component 760 may be configured as orotherwise support a means for waking up the one or more cells indicatedby the WUS based on the configuration for the WUS transmission includingthe indication of the first PS-RNTI. Additionally or alternatively, themulti-WUS component 760 may be configured as or otherwise support ameans for receiving, from the base station, a reconfiguration messagefor the WUS transmission, the reconfiguration message including anindication of the second PS-RNTI. In some examples, the multi-WUScomponent 760 may be configured as or otherwise support a means forwaking up the one or more additional cells indicated by the second WUSbased on receiving the reconfiguration message including the indicationof the second PS-RNTI.

In some examples, to support determining the error pattern of the set ofmultiple error patterns, the error patter determination component 735may be configured as or otherwise support a means for determining that asize of the WUS is different than the size of the WUS transmissionindicated in the configuration, that the size of the WUS is smaller thanor equal to the starting bit position for the UE to read of the WUStransmission indicated in the configuration, that a number of bits foran SCell dormancy indication in the WUS is different than a number ofdormancy groups for the UE, that the WUS indicates for the UE to notwake up a PCell and for the UE to wake up one or more SCells, or anycombination thereof.

FIG. 8 shows a diagram of a system 800 including a device 805 thatsupports WUS error handling in accordance with aspects of the presentdisclosure. The device 805 may be an example of or include thecomponents of a device 505, a device 605, or a UE 115 as describedherein. The device 805 may communicate wirelessly with one or more basestations 105, UEs 115, or any combination thereof. The device 805 mayinclude components for bi-directional voice and data communicationsincluding components for transmitting and receiving communications, suchas a communications manager 820, an input/output (I/O) controller 810, atransceiver 815, an antenna 825, a memory 830, code 835, and a processor840. These components may be in electronic communication or otherwisecoupled (e.g., operatively, communicatively, functionally,electronically, electrically) via one or more buses (e.g., a bus 845).

The I/O controller 810 may manage input and output signals for thedevice 805. The I/O controller 810 may also manage peripherals notintegrated into the device 805. In some cases, the I/O controller 810may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 810 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. Additionally or alternatively, the I/Ocontroller 810 may represent or interact with a modem, a keyboard, amouse, a touchscreen, or a similar device. In some cases, the I/Ocontroller 810 may be implemented as part of a processor, such as theprocessor 840. In some cases, a user may interact with the device 805via the I/O controller 810 or via hardware components controlled by theI/O controller 810.

In some cases, the device 805 may include a single antenna 825. However,in some other cases, the device 805 may have more than one antenna 825,which may be capable of concurrently transmitting or receiving multiplewireless transmissions. The transceiver 815 may communicatebi-directionally, via the one or more antennas 825, wired, or wirelesslinks as described herein. For example, the transceiver 815 mayrepresent a wireless transceiver and may communicate bi-directionallywith another wireless transceiver. The transceiver 815 may also includea modem to modulate the packets, to provide the modulated packets to oneor more antennas 825 for transmission, and to demodulate packetsreceived from the one or more antennas 825. The transceiver 815, or thetransceiver 815 and one or more antennas 825, may be an example of atransmitter 515, a transmitter 615, a receiver 510, a receiver 610, orany combination thereof or component thereof, as described herein.

The memory 830 may include random access memory (RAM) and read-onlymemory (ROM). The memory 830 may store computer-readable,computer-executable code 835 including instructions that, when executedby the processor 840, cause the device 805 to perform various functionsdescribed herein. The code 835 may be stored in a non-transitorycomputer-readable medium such as system memory or another type ofmemory. In some cases, the code 835 may not be directly executable bythe processor 840 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein. In some cases, thememory 830 may contain, among other things, a basic I/O system (BIOS)which may control basic hardware or software operation such as theinteraction with peripheral components or devices.

The processor 840 may include an intelligent hardware device (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 840 may be configured to operate a memoryarray using a memory controller. In some other cases, a memorycontroller may be integrated into the processor 840. The processor 840may be configured to execute computer-readable instructions stored in amemory (e.g., the memory 830) to cause the device 805 to perform variousfunctions (e.g., functions or tasks supporting WUS error handling). Forexample, the device 805 or a component of the device 805 may include aprocessor 840 and memory 830 coupled to the processor 840, the processor840 and memory 830 configured to perform various functions describedherein.

The communications manager 820 may support wireless communications at aUE in accordance with examples as disclosed herein. For example, thecommunications manager 820 may be configured as or otherwise support ameans for receiving, from a base station, a configuration for receivinga WUS transmission for a set of multiple UEs including the UE, theconfiguration including a size of the WUS transmission and a firststarting bit position of the WUS transmission for the UE to read. Thecommunications manager 820 may be configured as or otherwise support ameans for receiving, from the base station based on the configurationfor the WUS transmission, a WUS indicating for the UE to wake up one ormore cells to receive a transmission from the base station based on aconfigured offset between receiving the WUS and receiving thetransmission. The communications manager 820 may be configured as orotherwise support a means for determining that at least one errorpattern of a set of multiple error patterns occurs for the received WUS.The communications manager 820 may be configured as or otherwise supporta means for performing a mitigation operation based on determining theat least one error pattern.

By including or configuring the communications manager 820 in accordancewith examples as described herein, the device 805 may support techniquesfor improved communication reliability and improved coordination betweendevices. For example, based on detecting an error pattern for a WUS andperforming a mitigation operation, the device 805 may increase chancesthat a transmission in an on duration indicated by the WUS issuccessfully received, thereby increasing reliability. Additionally, insome examples, an additional device transmitting the WUS (e.g., a basestation 105) may transmit multiple WUSs according to differentconfigurations and with CRCs scrambled with corresponding RNTIs for eachof the multiple WUSs. As such, the additional device may coordinate withthe device 805 to ensure the configurations for each WUS aresuccessfully received at the device 805 to enable the transmission ofthe multiple WUSs.

In some examples, the communications manager 820 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the transceiver 815, the one ormore antennas 825, or any combination thereof. Although thecommunications manager 820 is illustrated as a separate component, insome examples, one or more functions described with reference to thecommunications manager 820 may be supported by or performed by theprocessor 840, the memory 830, the code 835, or any combination thereof.For example, the code 835 may include instructions executable by theprocessor 840 to cause the device 805 to perform various aspects of WUSerror handling as described herein, or the processor 840 and the memory830 may be otherwise configured to perform or support such operations.

FIG. 9 shows a block diagram 900 of a device 905 that supports WUS errorhandling in accordance with aspects of the present disclosure. Thedevice 905 may be an example of aspects of a base station 105 asdescribed herein. The device 905 may include a receiver 910, atransmitter 915, and a communications manager 920. The device 905 mayalso include a processor. Each of these components may be incommunication with one another (e.g., via one or more buses).

The receiver 910 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to WUS error handling).Information may be passed on to other components of the device 905. Thereceiver 910 may utilize a single antenna or a set of multiple antennas.

The transmitter 915 may provide a means for transmitting signalsgenerated by other components of the device 905. For example, thetransmitter 915 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to WUS error handling). In some examples, thetransmitter 915 may be co-located with a receiver 910 in a transceivermodule. The transmitter 915 may utilize a single antenna or a set ofmultiple antennas.

The communications manager 920, the receiver 910, the transmitter 915,or various combinations thereof or various components thereof may beexamples of means for performing various aspects of WUS error handlingas described herein. For example, the communications manager 920, thereceiver 910, the transmitter 915, or various combinations or componentsthereof may support a method for performing one or more of the functionsdescribed herein.

In some examples, the communications manager 920, the receiver 910, thetransmitter 915, or various combinations or components thereof may beimplemented in hardware (e.g., in communications management circuitry).The hardware may include a processor, a DSP, an ASIC, an FPGA or otherprogrammable logic device, a discrete gate or transistor logic, discretehardware components, or any combination thereof configured as orotherwise supporting a means for performing the functions described inthe present disclosure. In some examples, a processor and memory coupledwith the processor may be configured to perform one or more of thefunctions described herein (e.g., by executing, by the processor,instructions stored in the memory).

Additionally or alternatively, in some examples, the communicationsmanager 920, the receiver 910, the transmitter 915, or variouscombinations or components thereof may be implemented in code (e.g., ascommunications management software or firmware) executed by a processor.If implemented in code executed by a processor, the functions of thecommunications manager 920, the receiver 910, the transmitter 915, orvarious combinations or components thereof may be performed by ageneral-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or anycombination of these or other programmable logic devices (e.g.,configured as or otherwise supporting a means for performing thefunctions described in the present disclosure).

In some examples, the communications manager 920 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the receiver 910, the transmitter915, or both. For example, the communications manager 920 may receiveinformation from the receiver 910, send information to the transmitter915, or be integrated in combination with the receiver 910, thetransmitter 915, or both to receive information, transmit information,or perform various other operations as described herein.

The communications manager 920 may support wireless communications at abase station in accordance with examples as disclosed herein. Forexample, the communications manager 920 may be configured as orotherwise support a means for transmitting, to a set of multiple UEs, aconfiguration for receiving a WUS transmission for the set of multipleUEs, the configuration including a size of the WUS transmission andrespective starting bit positions of the WUS transmission for each UE ofthe set of multiple UEs to read. The communications manager 920 may beconfigured as or otherwise support a means for determining that at leastone UE of the set of multiple UEs is no longer connected to the basestation and that a subset of the set of multiple UEs different than theat least one UE are connected to the base station. The communicationsmanager 920 may be configured as or otherwise support a means fortransmitting, to the subset of the set of multiple UEs, areconfiguration message for receiving the WUS transmission based ondetermining that the at least one UE is no longer connected to the basestation. The communications manager 920 may be configured as orotherwise support a means for transmitting, to the subset of the set ofmultiple UEs, a WUS based on the reconfiguration message.

FIG. 10 shows a block diagram 1000 of a device 1005 that supports WUSerror handling in accordance with aspects of the present disclosure. Thedevice 1005 may be an example of aspects of a device 905 or a basestation 105 as described herein. The device 1005 may include a receiver1010, a transmitter 1015, and a communications manager 1020. The device1005 may also include a processor. Each of these components may be incommunication with one another (e.g., via one or more buses).

The receiver 1010 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to WUS error handling).Information may be passed on to other components of the device 1005. Thereceiver 1010 may utilize a single antenna or a set of multipleantennas.

The transmitter 1015 may provide a means for transmitting signalsgenerated by other components of the device 1005. For example, thetransmitter 1015 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to WUS error handling). In some examples, thetransmitter 1015 may be co-located with a receiver 1010 in a transceivermodule. The transmitter 1015 may utilize a single antenna or a set ofmultiple antennas.

The device 1005, or various components thereof, may be an example ofmeans for performing various aspects of WUS error handling as describedherein. For example, the communications manager 1020 may include a WUSconfiguration indication component 1025, a UE connection component 1030,a WUS reconfiguration component 1035, a WUS transmission component 1040,or any combination thereof. The communications manager 1020 may be anexample of aspects of a communications manager 920 as described herein.In some examples, the communications manager 1020, or various componentsthereof, may be configured to perform various operations (e.g.,receiving, monitoring, transmitting) using or otherwise in cooperationwith the receiver 1010, the transmitter 1015, or both. For example, thecommunications manager 1020 may receive information from the receiver1010, send information to the transmitter 1015, or be integrated incombination with the receiver 1010, the transmitter 1015, or both toreceive information, transmit information, or perform various otheroperations as described herein.

The communications manager 1020 may support wireless communications at abase station in accordance with examples as disclosed herein. The WUSconfiguration indication component 1025 may be configured as orotherwise support a means for transmitting, to a set of multiple UEs, aconfiguration for receiving a WUS transmission for the set of multipleUEs, the configuration including a size of the WUS transmission andrespective starting bit positions of the WUS transmission for each UE ofthe set of multiple UEs to read. The UE connection component 1030 may beconfigured as or otherwise support a means for determining that at leastone UE of the set of multiple UEs is no longer connected to the basestation and that a subset of the set of multiple UEs different than theat least one UE are connected to the base station. The WUSreconfiguration component 1035 may be configured as or otherwise supporta means for transmitting, to the subset of the set of multiple UEs, areconfiguration message for receiving the WUS transmission based ondetermining that the at least one UE is no longer connected to the basestation. The WUS transmission component 1040 may be configured as orotherwise support a means for transmitting, to the subset of the set ofmultiple UEs, a WUS based on the reconfiguration message.

FIG. 11 shows a block diagram 1100 of a communications manager 1120 thatsupports WUS error handling in accordance with aspects of the presentdisclosure. The communications manager 1120 may be an example of aspectsof a communications manager 920, a communications manager 1020, or both,as described herein. The communications manager 1120, or variouscomponents thereof, may be an example of means for performing variousaspects of WUS error handling as described herein. For example, thecommunications manager 1120 may include a WUS configuration indicationcomponent 1125, a UE connection component 1130, a WUS reconfigurationcomponent 1135, a WUS transmission component 1140, an RLF component1145, a reconfiguration complete component 1150, a multi-WUS component1155, or any combination thereof. Each of these components maycommunicate, directly or indirectly, with one another (e.g., via one ormore buses).

The communications manager 1120 may support wireless communications at abase station in accordance with examples as disclosed herein. The WUSconfiguration indication component 1125 may be configured as orotherwise support a means for transmitting, to a set of multiple UEs, aconfiguration for receiving a WUS transmission for the set of multipleUEs, the configuration including a size of the WUS transmission andrespective starting bit positions of the WUS transmission for each UE ofthe set of multiple UEs to read. The UE connection component 1130 may beconfigured as or otherwise support a means for determining that at leastone UE of the set of multiple UEs is no longer connected to the basestation and that a subset of the set of multiple UEs different than theat least one UE are connected to the base station. The WUSreconfiguration component 1135 may be configured as or otherwise supporta means for transmitting, to the subset of the set of multiple UEs, areconfiguration message for receiving the WUS transmission based ondetermining that the at least one UE is no longer connected to the basestation. The WUS transmission component 1140 may be configured as orotherwise support a means for transmitting, to the subset of the set ofmultiple UEs, a WUS based on the reconfiguration message.

In some examples, the RLF component 1145 may be configured as orotherwise support a means for receiving, from a UE of the subset of theset of multiple UEs, an RLF indication to release a connection with theUE based on a number of error patterns occurring for the UE whenreceiving the WUS. In some examples, the RLF component 1145 may beconfigured as or otherwise support a means for attempting to reestablishthe connection with the UE based on receiving the RLF. In some examples,the RLF indication may be received based on the number of error patternssatisfying a threshold value.

In some examples, the reconfiguration complete component 1150 may beconfigured as or otherwise support a means for receiving, from each UEof the subset of the set of multiple UEs, a reconfiguration completemessage indicating successful reception of the reconfiguration message,where the WUS is transmitted according to the reconfiguration messagebased on receiving the reconfiguration complete message from each UE ofthe subset of the set of multiple UEs.

In some examples, the multi-WUS component 1155 may be configured as orotherwise support a means for transmitting, to the subset of the set ofmultiple UEs, a first WUS according to the configuration for the WUStransmission, where a first CRC of the first WUS is scrambled with afirst PS-RNTI included in the configuration for the WUS transmission. Insome examples, the multi-WUS component 1155 may be configured as orotherwise support a means for transmitting, to the subset of the set ofmultiple UEs, a second WUS according to a reconfiguration in thereconfiguration message for the WUS transmission, where a second CRC isscrambled with a second PS-RNTI included in the reconfiguration messagefor the WUS transmission.

In some examples, the multi-WUS component 1155 may be configured as orotherwise support a means for receiving, from each UE of the subset ofthe set of multiple UEs, a reconfiguration complete message indicatingsuccessful reception of the reconfiguration message. In some examples,the multi-WUS component 1155 may be configured as or otherwise support ameans for refraining from transmitting a subsequent WUS according to theconfiguration for the WUS transmission based on receiving thereconfiguration complete message from each UE of the subset of the setof multiple UEs.

FIG. 12 shows a diagram of a system 1200 including a device 1205 thatsupports WUS error handling in accordance with aspects of the presentdisclosure. The device 1205 may be an example of or include thecomponents of a device 905, a device 1005, or a base station 105 asdescribed herein. The device 1205 may communicate wirelessly with one ormore base stations 105, UEs 115, or any combination thereof. The device1205 may include components for bi-directional voice and datacommunications including components for transmitting and receivingcommunications, such as a communications manager 1220, a networkcommunications manager 1210, a transceiver 1215, an antenna 1225, amemory 1230, code 1235, a processor 1240, and an inter-stationcommunications manager 1245. These components may be in electroniccommunication or otherwise coupled (e.g., operatively, communicatively,functionally, electronically, electrically) via one or more buses (e.g.,a bus 1250).

The network communications manager 1210 may manage communications with acore network 130 (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1210 may manage the transferof data communications for client devices, such as one or more UEs 115.

In some cases, the device 1205 may include a single antenna 1225.However, in some other cases the device 1205 may have more than oneantenna 1225, which may be capable of concurrently transmitting orreceiving multiple wireless transmissions. The transceiver 1215 maycommunicate bi-directionally, via the one or more antennas 1225, wired,or wireless links as described herein. For example, the transceiver 1215may represent a wireless transceiver and may communicatebi-directionally with another wireless transceiver. The transceiver 1215may also include a modem to modulate the packets, to provide themodulated packets to one or more antennas 1225 for transmission, and todemodulate packets received from the one or more antennas 1225. Thetransceiver 1215, or the transceiver 1215 and one or more antennas 1225,may be an example of a transmitter 915, a transmitter 1015, a receiver910, a receiver 1010, or any combination thereof or component thereof,as described herein.

The memory 1230 may include RAM and ROM. The memory 1230 may storecomputer-readable, computer-executable code 1235 including instructionsthat, when executed by the processor 1240, cause the device 1205 toperform various functions described herein. The code 1235 may be storedin a non-transitory computer-readable medium such as system memory oranother type of memory. In some cases, the code 1235 may not be directlyexecutable by the processor 1240 but may cause a computer (e.g., whencompiled and executed) to perform functions described herein. In somecases, the memory 1230 may contain, among other things, a BIOS which maycontrol basic hardware or software operation such as the interactionwith peripheral components or devices.

The processor 1240 may include an intelligent hardware device (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1240 may be configured to operate a memoryarray using a memory controller. In some other cases, a memorycontroller may be integrated into the processor 1240. The processor 1240may be configured to execute computer-readable instructions stored in amemory (e.g., the memory 1230) to cause the device 1205 to performvarious functions (e.g., functions or tasks supporting WUS errorhandling). For example, the device 1205 or a component of the device1205 may include a processor 1240 and memory 1230 coupled to theprocessor 1240, the processor 1240 and memory 1230 configured to performvarious functions described herein.

The inter-station communications manager 1245 may manage communicationswith other base stations 105, and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1245 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1245 may provide an X2 interface within an LTE/LTE-A wirelesscommunications network technology to provide communication between basestations 105.

The communications manager 1220 may support wireless communications at abase station in accordance with examples as disclosed herein. Forexample, the communications manager 1220 may be configured as orotherwise support a means for transmitting, to a set of multiple UEs, aconfiguration for receiving a WUS transmission for the set of multipleUEs, the configuration including a size of the WUS transmission andrespective starting bit positions of the WUS transmission for each UE ofthe set of multiple UEs to read. The communications manager 1220 may beconfigured as or otherwise support a means for determining that at leastone UE of the set of multiple UEs is no longer connected to the basestation and that a subset of the set of multiple UEs different than theat least one UE are connected to the base station. The communicationsmanager 1220 may be configured as or otherwise support a means fortransmitting, to the subset of the set of multiple UEs, areconfiguration message for receiving the WUS transmission based ondetermining that the at least one UE is no longer connected to the basestation. The communications manager 1220 may be configured as orotherwise support a means for transmitting, to the subset of the set ofmultiple UEs, a WUS based on the reconfiguration message.

In some examples, the communications manager 1220 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the transceiver 1215, the one ormore antennas 1225, or any combination thereof. Although thecommunications manager 1220 is illustrated as a separate component, insome examples, one or more functions described with reference to thecommunications manager 1220 may be supported by or performed by theprocessor 1240, the memory 1230, the code 1235, or any combinationthereof. For example, the code 1235 may include instructions executableby the processor 1240 to cause the device 1205 to perform variousaspects of WUS error handling as described herein, or the processor 1240and the memory 1230 may be otherwise configured to perform or supportsuch operations.

FIG. 13 shows a flowchart illustrating a method 1300 that supports WUSerror handling in accordance with aspects of the present disclosure. Theoperations of the method 1300 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1300 may be performed by a UE 115 as described with reference toFIGS. 1 through 8 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1305, the method may include receiving, from a base station, aconfiguration for receiving a WUS transmission for a set of multiple UEsincluding the UE, the configuration including a size of the WUStransmission and a first starting bit position of the WUS transmissionfor the UE to read. The operations of 1305 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1305 may be performed by a WUS configurationcomponent 725 as described with reference to FIG. 7 .

At 1310, the method may include receiving, from the base station basedon the configuration for the WUS transmission, a WUS indicating for theUE to wake up one or more cells to receive a transmission from the basestation based on a configured offset between receiving the WUS andreceiving the transmission. The operations of 1310 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1310 may be performed by a WUS reception component730 as described with reference to FIG. 7 .

At 1315, the method may include determining that at least one errorpattern of a set of multiple error patterns occurs for the received WUS.The operations of 1315 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1315may be performed by an error patter determination component 735 asdescribed with reference to FIG. 7 .

At 1320, the method may include performing a mitigation operation basedon determining the at least one error pattern. The operations of 1320may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1320 may be performed by anerror pattern mitigation component 740 as described with reference toFIG. 7 .

FIG. 14 shows a flowchart illustrating a method 1400 that supports WUSerror handling in accordance with aspects of the present disclosure. Theoperations of the method 1400 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1400 may be performed by a UE 115 as described with reference toFIGS. 1 through 8 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1405, the method may include receiving, from a base station, aconfiguration for receiving a WUS transmission for a set of multiple UEsincluding the UE, the configuration including a size of the WUStransmission and a first starting bit position of the WUS transmissionfor the UE to read. The operations of 1405 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1405 may be performed by a WUS configurationcomponent 725 as described with reference to FIG. 7 .

At 1410, the method may include receiving, from the base station basedon the configuration for the WUS transmission, a WUS indicating for theUE to wake up one or more cells to receive a transmission from the basestation based on a configured offset between receiving the WUS andreceiving the transmission. The operations of 1410 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1410 may be performed by a WUS reception component730 as described with reference to FIG. 7 .

At 1415, the method may include determining that at least one errorpattern of a set of multiple error patterns occurs for the received WUS.The operations of 1415 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1415may be performed by an error patter determination component 735 asdescribed with reference to FIG. 7 .

At 1420, the method may include performing a mitigation operation basedon determining the at least one error pattern. The operations of 1420may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1420 may be performed by anerror pattern mitigation component 740 as described with reference toFIG. 7 .

At 1425, the method may include waking up a set of multiple cells toreceive the transmission indicated by the WUS based on determining theat least one error pattern. The operations of 1425 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1425 may be performed by a cell wake up component745 as described with reference to FIG. 7 .

FIG. 15 shows a flowchart illustrating a method 1500 that supports WUSerror handling in accordance with aspects of the present disclosure. Theoperations of the method 1500 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1500 may be performed by a UE 115 as described with reference toFIGS. 1 through 8 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1505, the method may include receiving, from a base station, aconfiguration for receiving a WUS transmission for a set of multiple UEsincluding the UE, the configuration including a size of the WUStransmission and a first starting bit position of the WUS transmissionfor the UE to read. The operations of 1505 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1505 may be performed by a WUS configurationcomponent 725 as described with reference to FIG. 7 .

At 1510, the method may include receiving, from the base station basedon the configuration for the WUS transmission, a WUS indicating for theUE to wake up one or more cells to receive a transmission from the basestation based on a configured offset between receiving the WUS andreceiving the transmission. The operations of 1510 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1510 may be performed by a WUS reception component730 as described with reference to FIG. 7 .

At 1515, the method may include determining that at least one errorpattern of a set of multiple error patterns occurs for the received WUS.The operations of 1515 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1515may be performed by an error patter determination component 735 asdescribed with reference to FIG. 7 .

At 1520, the method may include performing a mitigation operation basedon determining the at least one error pattern. The operations of 1520may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1520 may be performed by anerror pattern mitigation component 740 as described with reference toFIG. 7 .

At 1525, the method may include transmitting, to the base station, anRLF indication to release a connection with the base station based ondetermining the at least one error pattern. The operations of 1525 maybe performed in accordance with examples as disclosed herein. In someexamples, aspects of the operations of 1525 may be performed by an RLFcomponent 750 as described with reference to FIG. 7 .

At 1530, the method may include attempting to reestablish the connectionwith the base station based on transmitting the RLF indication. Theoperations of 1530 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1530may be performed by an RLF component 750 as described with reference toFIG. 7 .

FIG. 16 shows a flowchart illustrating a method 1600 that supports WUSerror handling in accordance with aspects of the present disclosure. Theoperations of the method 1600 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1600 may be performed by a UE 115 as described with reference toFIGS. 1 through 8 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1605, the method may include receiving, from a base station, aconfiguration for receiving a WUS transmission for a set of multiple UEsincluding the UE, the configuration including a size of the WUStransmission and a first starting bit position of the WUS transmissionfor the UE to read. The operations of 1605 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1605 may be performed by a WUS configurationcomponent 725 as described with reference to FIG. 7 .

At 1610, the method may include receiving, from the base station basedon the configuration for the WUS transmission, a WUS indicating for theUE to wake up one or more cells to receive a transmission from the basestation based on a configured offset between receiving the WUS andreceiving the transmission. The operations of 1610 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1610 may be performed by a WUS reception component730 as described with reference to FIG. 7 .

At 1615, the method may include determining that at least one errorpattern of a set of multiple error patterns occurs for the received WUS.The operations of 1615 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1615may be performed by an error patter determination component 735 asdescribed with reference to FIG. 7 .

At 1620, the method may include determining that a size of the WUS isdifferent than the size of the WUS transmission indicated in theconfiguration, that the size of the WUS is smaller than or equal to thestarting bit position for the UE to read of the WUS transmissionindicated in the configuration, that a number of bits for an SCelldormancy indication in the WUS is different than a number of dormancygroups for the UE, that the WUS indicates for the UE to not wake up aPCell and for the UE to wake up one or more SCells, or any combinationthereof. The operations of 1620 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1620 may be performed by an error patter determinationcomponent 735 as described with reference to FIG. 7 .

At 1625, the method may include performing a mitigation operation basedon determining the at least one error pattern. The operations of 1625may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1625 may be performed by anerror pattern mitigation component 740 as described with reference toFIG. 7 .

FIG. 17 shows a flowchart illustrating a method 1700 that supports WUSerror handling in accordance with aspects of the present disclosure. Theoperations of the method 1700 may be implemented by a base station orits components as described herein. For example, the operations of themethod 1700 may be performed by a base station 105 as described withreference to FIGS. 1 through 4 and 9 through 12 . In some examples, abase station may execute a set of instructions to control the functionalelements of the base station to perform the described functions.Additionally or alternatively, the base station may perform aspects ofthe described functions using special-purpose hardware.

At 1705, the method may include transmitting, to a set of multiple UEs,a configuration for receiving a WUS transmission for the set of multipleUEs, the configuration including a size of the WUS transmission andrespective starting bit positions of the WUS transmission for each UE ofthe set of multiple UEs to read. The operations of 1705 may be performedin accordance with examples as disclosed herein. In some examples,aspects of the operations of 1705 may be performed by a WUSconfiguration indication component 1125 as described with reference toFIG. 11 .

At 1710, the method may include determining that at least one UE of theset of multiple UEs is no longer connected to the base station and thata subset of the set of multiple UEs different than the at least one UEare connected to the base station. The operations of 1710 may beperformed in accordance with examples as disclosed herein. In someexamples, aspects of the operations of 1710 may be performed by a UEconnection component 1130 as described with reference to FIG. 11 .

At 1715, the method may include transmitting, to the subset of the setof multiple UEs, a reconfiguration message for receiving the WUStransmission based on determining that the at least one UE is no longerconnected to the base station. The operations of 1715 may be performedin accordance with examples as disclosed herein. In some examples,aspects of the operations of 1715 may be performed by a WUSreconfiguration component 1135 as described with reference to FIG. 11 .

At 1720, the method may include transmitting, to the subset of the setof multiple UEs, a WUS based on the reconfiguration message. Theoperations of 1720 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1720may be performed by a WUS transmission component 1140 as described withreference to FIG. 11 .

FIG. 18 shows a flowchart illustrating a method 1800 that supports WUSerror handling in accordance with aspects of the present disclosure. Theoperations of the method 1800 may be implemented by a base station orits components as described herein. For example, the operations of themethod 1800 may be performed by a base station 105 as described withreference to FIGS. 1 through 4 and 9 through 12 . In some examples, abase station may execute a set of instructions to control the functionalelements of the base station to perform the described functions.Additionally or alternatively, the base station may perform aspects ofthe described functions using special-purpose hardware.

At 1805, the method may include transmitting, to a set of multiple UEs,a configuration for receiving a WUS transmission for the set of multipleUEs, the configuration including a size of the WUS transmission andrespective starting bit positions of the WUS transmission for each UE ofthe set of multiple UEs to read. The operations of 1805 may be performedin accordance with examples as disclosed herein. In some examples,aspects of the operations of 1805 may be performed by a WUSconfiguration indication component 1125 as described with reference toFIG. 11 .

At 1810, the method may include determining that at least one UE of theset of multiple UEs is no longer connected to the base station and thata subset of the set of multiple UEs different than the at least one UEare connected to the base station. The operations of 1810 may beperformed in accordance with examples as disclosed herein. In someexamples, aspects of the operations of 1810 may be performed by a UEconnection component 1130 as described with reference to FIG. 11 .

At 1815, the method may include transmitting, to the subset of the setof multiple UEs, a reconfiguration message for receiving the WUStransmission based on determining that the at least one UE is no longerconnected to the base station. The operations of 1815 may be performedin accordance with examples as disclosed herein. In some examples,aspects of the operations of 1815 may be performed by a WUSreconfiguration component 1135 as described with reference to FIG. 11 .

At 1820, the method may include transmitting, to the subset of the setof multiple UEs, a WUS based on the reconfiguration message. Theoperations of 1820 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1820may be performed by a WUS transmission component 1140 as described withreference to FIG. 11 .

At 1825, the method may include transmitting, to the subset of the setof multiple UEs, a first WUS according to the configuration for the WUStransmission, where a first CRC of the first WUS is scrambled with afirst PS-RNTI included in the configuration for the WUS transmission.The operations of 1825 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1825may be performed by a multi-WUS component 1155 as described withreference to FIG. 11 .

At 1830, the method may include transmitting, to the subset of the setof multiple UEs, a second WUS according to a reconfiguration in thereconfiguration message for the WUS transmission, where a second CRC isscrambled with a second PS-RNTI included in the reconfiguration messagefor the WUS transmission. The operations of 1830 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1830 may be performed by a multi-WUS component 1155as described with reference to FIG. 11 .

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communications at a UE, comprising:receiving, from a base station, a configuration for receiving a wake-upsignal transmission for a plurality of UEs comprising the UE, theconfiguration comprising a size of the wake-up signal transmission and afirst starting bit position of the wake-up signal transmission for theUE to read; receiving, from the base station based at least in part onthe configuration for the wake-up signal transmission, a wake-up signalindicating for the UE to wake up one or more cells to receive atransmission from the base station based at least in part on aconfigured offset between receiving the wake-up signal and receiving thetransmission; determining that at least one error pattern of a pluralityof error patterns occurs for the received wake-up signal; and performinga mitigation operation based at least in part on determining the atleast one error pattern.

Aspect 2: The method of aspect 1, wherein performing the mitigationoperation comprises: waking up a plurality of cells to receive thetransmission indicated by the wake-up signal based at least in part ondetermining the at least one error pattern.

Aspect 3: The method of aspect 2, wherein the plurality of cellscomprises a primary cell of a master cell group, one or more secondarycells of the master cell group, a primary secondary cell of a secondarycell group, one or more secondary cells of the secondary cell group, orany combination thereof.

Aspect 4: The method of aspect 1, wherein performing the mitigationoperation comprises: transmitting, to the base station, a radio linkfailure indication for releasing a connection with the base stationbased at least in part on determining the at least one error pattern;and attempting to reestablish the connection with the base station basedat least in part on transmitting the radio link failure.

Aspect 5: The method of aspect 4, further comprising: determining totransmit the radio link failure indication based at least in part ondetermining that a number of error patterns for receiving the wake-upsignal transmission according to the configuration occur, wherein thenumber of error patterns satisfies a threshold value.

Aspect 6: The method of any of aspects 1 through 5, further comprising:receiving, from the base station, a reconfiguration message for thewake-up signal transmission, the reconfiguration message comprising asecond size of the wake-up signal transmission different than the sizeof the wake-up signal transmission, comprising a second starting bitposition for the UE to read of the wake-up signal transmission differentthan the first starting bit position, or both; and receiving, from thebase station, a second wake-up signal based at least in part on thereconfiguration message.

Aspect 7: The method of aspect 6, further comprising: transmitting, tothe base station, a reconfiguration complete message indicatingsuccessful reception of the reconfiguration message, wherein the secondwake-up signal is received based at least in part on transmitting thereconfiguration complete message.

Aspect 8: The method of any of aspects 1 through 7, wherein theconfiguration for the wake-up signal transmission further comprises anindication of a first power saving radio network temporary identifierwith which a cyclic redundancy check of the wake-up signal is scrambled,the method further comprising: receiving the wake-up signal based atleast in part on the cyclic redundancy check of the wake-up signal beingscrambled with the first power saving radio network temporaryidentifier; and receiving, from the base station, a second wake-upsignal with a cyclic redundancy check scrambled with a second powersaving radio network temporary identifier, the second wake-up signalindicating for the UE to wake up one or more additional cells to receivethe transmission from the base station.

Aspect 9: The method of aspect 8, further comprising: waking up the oneor more cells indicated by the wake-up signal based at least in part onthe configuration for the wake-up signal transmission comprising theindication of the first power saving radio network temporary identifier.

Aspect 10: The method of any of aspects 8 through 9, further comprising:receiving, from the base station, a reconfiguration message for thewake-up signal transmission, the reconfiguration message comprising anindication of the second power saving radio network temporaryidentifier; and waking up the one or more additional cells indicated bythe second wake-up signal based at least in part on receiving thereconfiguration message comprising the indication of the second powersaving radio network temporary identifier.

Aspect 11: The method of any of aspects 1 through 10, whereindetermining the error pattern of the plurality of error patternscomprises: determining that a size of the wake-up signal is differentthan the size of the wake-up signal transmission indicated in theconfiguration, that the size of the wake-up signal is smaller than orequal to the starting bit position for the UE to read of the wake-upsignal transmission indicated in the configuration, that a number ofbits for a secondary cell dormancy indication in the wake-up signal isdifferent than a number of dormancy groups for the UE, that the wake-upsignal indicates for the UE to not wake up a primary cell and for the UEto wake up one or more secondary cells, or any combination thereof.

Aspect 12: A method for wireless communications at a base station,comprising: transmitting, to a plurality of user equipment (UEs), aconfiguration for receiving a wake-up signal transmission for theplurality of UEs, the configuration comprising a size of the wake-upsignal transmission and respective starting bit positions of the wake-upsignal transmission for each UE of the plurality of UEs to read;determining that at least one UE of the plurality of UEs is no longerconnected to the base station and that a subset of the plurality of UEsdifferent than the at least one UE are connected to the base station;transmitting, to the subset of the plurality of UEs, a reconfigurationmessage for receiving the wake-up signal transmission based at least inpart on determining that the at least one UE is no longer connected tothe base station; and transmitting, to the subset of the plurality ofUEs, a wake-up signal based at least in part on the reconfigurationmessage.

Aspect 13: The method of aspect 12, further comprising: receiving, froma UE of the subset of the plurality of UEs, a radio link failureindication to release a connection with the UE based at least in part ona number of error patterns occurring for the UE when receiving thewake-up signal; and attempting to reestablish the connection with the UEbased at least in part on receiving the radio link failure.

Aspect 14: The method of aspect 13, wherein the radio link failureindication is received based at least in part on the number of errorpatterns satisfying a threshold value.

Aspect 15: The method of any of aspects 12 through 14, furthercomprising: receiving, from each UE of the subset of the plurality ofUEs, a reconfiguration complete message indicating successful receptionof the reconfiguration message, wherein the wake-up signal istransmitted according to the reconfiguration message based at least inpart on receiving the reconfiguration complete message from each UE ofthe subset of the plurality of UEs.

Aspect 16: The method of any of aspects 12 through 15, furthercomprising: transmitting, to the subset of the plurality of UEs, a firstwake-up signal according to the configuration for the wake-up signaltransmission, wherein a first cyclic redundancy check of the firstwake-up signal is scrambled with a first power saving radio networktemporary identifier included in the configuration for the wake-upsignal transmission; and transmitting, to the subset of the plurality ofUEs, a second wake-up signal according to a reconfiguration in thereconfiguration message for the wake-up signal transmission, wherein asecond cyclic redundancy check is scrambled with a second power savingradio network temporary identifier included in the reconfigurationmessage for the wake-up signal transmission.

Aspect 17: The method of aspect 16, further comprising: receiving, fromeach UE of the subset of the plurality of UEs, a reconfigurationcomplete message indicating successful reception of the reconfigurationmessage; and refraining from transmitting a subsequent wake-up signalaccording to the configuration for the wake-up signal transmission basedat least in part on receiving the reconfiguration complete message fromeach UE of the subset of the plurality of UEs.

Aspect 18: An apparatus for wireless communications at a UE, comprisinga processor; memory coupled with the processor; and instructions storedin the memory and executable by the processor to cause the apparatus toperform a method of any of aspects 1 through 11.

Aspect 19: An apparatus for wireless communications at a UE, comprisingat least one means for performing a method of any of aspects 1 through11.

Aspect 20: A non-transitory computer-readable medium storing code forwireless communications at a UE, the code comprising instructionsexecutable by a processor to perform a method of any of aspects 1through 11.

Aspect 21: An apparatus for wireless communications at a base station,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform a method of any of aspects 12 through 17.

Aspect 22: An apparatus for wireless communications at a base station,comprising at least one means for performing a method of any of aspects12 through 17.

Aspect 23: A non-transitory computer-readable medium storing code forwireless communications at a base station, the code comprisinginstructions executable by a processor to perform a method of any ofaspects 12 through 17.

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may bedescribed for purposes of example, and LTE, LTE-A, LTE-A Pro, or NRterminology may be used in much of the description, the techniquesdescribed herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NRnetworks. For example, the described techniques may be applicable tovarious other wireless communications systems such as Ultra MobileBroadband (UMB), Institute of Electrical and Electronics Engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, aswell as other systems and radio technologies not explicitly mentionedherein.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connectionwith the disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, a CPU, an FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyprocessor, controller, microcontroller, or state machine. A processormay also be implemented as a combination of computing devices (e.g., acombination of a DSP and a microprocessor, multiple microprocessors, oneor more microprocessors in conjunction with a DSP core, or any othersuch configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein may be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that may beaccessed by a general-purpose or special-purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude RAM, ROM, electrically erasable programmable ROM (EEPROM), flashmemory, compact disk (CD) ROM or other optical disk storage, magneticdisk storage or other magnetic storage devices, or any othernon-transitory medium that may be used to carry or store desired programcode means in the form of instructions or data structures and that maybe accessed by a general-purpose or special-purpose computer, or ageneral-purpose or special-purpose processor. Also, any connection isproperly termed a computer-readable medium. For example, if the softwareis transmitted from a website, server, or other remote source using acoaxial cable, fiber optic cable, twisted pair, digital subscriber line(DSL), or wireless technologies such as infrared, radio, and microwave,then the coaxial cable, fiber optic cable, twisted pair, DSL, orwireless technologies such as infrared, radio, and microwave areincluded in the definition of computer-readable medium. Disk and disc,as used herein, include CD, laser disc, optical disc, digital versatiledisc (DVD), floppy disk and Blu-ray disc where disks usually reproducedata magnetically, while discs reproduce data optically with lasers.Combinations of the above are also included within the scope ofcomputer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an example step that is described as “based on condition A”may be based on both a condition A and a condition B without departingfrom the scope of the present disclosure. In other words, as usedherein, the phrase “based on” shall be construed in the same manner asthe phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “example” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, known structures and devices are shown inblock diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person having ordinaryskill in the art to make or use the disclosure. Various modifications tothe disclosure will be apparent to a person having ordinary skill in theart, and the generic principles defined herein may be applied to othervariations without departing from the scope of the disclosure. Thus, thedisclosure is not limited to the examples and designs described hereinbut is to be accorded the broadest scope consistent with the principlesand novel features disclosed herein.

What is claimed is:
 1. An apparatus for wireless communications at anetwork device, comprising: a processor; memory coupled with theprocessor; and instructions stored in the memory and executable by theprocessor to cause the apparatus to: transmit, to a plurality of userequipment (UEs), a configuration for receiving a wake-up signaltransmission for the plurality of UEs, the configuration comprising asize of the wake-up signal transmission and respective starting bitpositions indicating a portion of the wake-up signal transmissionintended for each UE of the plurality of UEs to read; transmit, to asubset of the plurality of UEs, a reconfiguration message for receivingthe wake-up signal transmission based at least in part on at least oneUE of the plurality of UEs being no longer connected to the networkdevice, the subset of the plurality of UEs being connected to thenetwork device and different from the at least one UE; and transmit, tothe subset of the plurality of UEs, a wake-up signal based at least inpart on the reconfiguration message.
 2. The apparatus of claim 1,wherein the instructions are further executable by the processor tocause the apparatus to: receive, from a UE of the subset of theplurality of UEs, a radio link failure indication to release aconnection with the UE based at least in part on a number of errorpatterns occurring for the UE when receiving the wake-up signal; andattempt to reestablish the connection with the UE based at least in parton receiving the radio link failure indication.
 3. The apparatus ofclaim 2, wherein the radio link failure indication is received based atleast in part on the number of error patterns satisfying a thresholdvalue.
 4. The apparatus of claim 1, wherein the instructions are furtherexecutable by the processor to cause the apparatus to: receive, fromeach UE of the subset of the plurality of UEs, a reconfigurationcomplete message indicating successful reception of the reconfigurationmessage, wherein the wake-up signal is transmitted according to thereconfiguration message based at least in part on receiving thereconfiguration complete message from each UE of the subset of theplurality of UEs.
 5. The apparatus of claim 1, wherein the instructionsare further executable by the processor to cause the apparatus to:transmit, to the subset of the plurality of UEs, a first wake-up signalaccording to the configuration for the wake-up signal transmission,wherein a first cyclic redundancy check of the first wake-up signal isscrambled with a first power saving radio network temporary identifierincluded in the configuration for the wake-up signal transmission; andtransmit, to the subset of the plurality of UEs, a second wake-up signalaccording to a reconfiguration in the reconfiguration message for thewake-up signal transmission, wherein a second cyclic redundancy check isscrambled with a second power saving radio network temporary identifierincluded in the reconfiguration message for the wake-up signaltransmission.
 6. The apparatus of claim 5, wherein the instructions arefurther executable by the processor to cause the apparatus to: receive,from each UE of the subset of the plurality of UEs, a reconfigurationcomplete message indicating successful reception of the reconfigurationmessage; and refrain from transmitting a subsequent wake-up signalaccording to the configuration for the wake-up signal transmission basedat least in part on receiving the reconfiguration complete message fromeach UE of the subset of the plurality of UEs.
 7. The apparatus of claim1, wherein the instructions to transmit the wake-up signal areexecutable by the processor to cause the apparatus to: transmit, via thewake-up signal, a plurality of respective bits for each UE of the subsetof the plurality of UEs, the plurality of respective bits indicating oneor more cells for each UE of the subset of the plurality of UEs to wakeup.
 8. The apparatus of claim 1, wherein the instructions are furtherexecutable by the processor to cause the apparatus to: determine thatthe at least one UE of the plurality of UEs is no longer connected tothe network device, wherein transmitting the reconfiguration message tothe subset of the plurality of UEs is based at least in part on thedetermining.
 9. A method for wireless communications at a networkdevice, comprising: transmitting, to a plurality of user equipment(UEs), a configuration for receiving a wake-up signal transmission forthe plurality of UEs, the configuration comprising a size of the wake-upsignal transmission and respective starting bit positions indicating aportion of the wake-up signal transmission intended for each UE of theplurality of UEs to read; transmitting, to a subset of the plurality ofUEs, a reconfiguration message for receiving the wake-up signaltransmission based at least in part on at least one UE of the pluralityof UEs being no longer connected to the network device, the subset ofthe plurality of UEs being connected to the network device and differentfrom the at least one UE; and transmitting, to the subset of theplurality of UEs, a wake-up signal based at least in part on thereconfiguration message.
 10. The method of claim 9, further comprising:receiving, from a UE of the subset of the plurality of UEs, a radio linkfailure indication to release a connection with the UE based at least inpart on a number of error patterns occurring for the UE when receivingthe wake-up signal; and attempting to reestablish the connection withthe UE based at least in part on receiving the radio link failureindication.
 11. The method of claim 10, wherein the radio link failureindication is received based at least in part on the number of errorpatterns satisfying a threshold value.
 12. The method of claim 9,further comprising: receiving, from each UE of the subset of theplurality of UEs, a reconfiguration complete message indicatingsuccessful reception of the reconfiguration message, wherein the wake-upsignal is transmitted according to the reconfiguration message based atleast in part on receiving the reconfiguration complete message fromeach UE of the subset of the plurality of UEs.
 13. The method of claim9, further comprising: transmitting, to the subset of the plurality ofUEs, a first wake-up signal according to the configuration for thewake-up signal transmission, wherein a first cyclic redundancy check ofthe first wake-up signal is scrambled with a first power saving radionetwork temporary identifier included in the configuration for thewake-up signal transmission; and transmitting, to the subset of theplurality of UEs, a second wake-up signal according to a reconfigurationin the reconfiguration message for the wake-up signal transmission,wherein a second cyclic redundancy check is scrambled with a secondpower saving radio network temporary identifier included in thereconfiguration message for the wake-up signal transmission.
 14. Themethod of claim 13, further comprising: receiving, from each UE of thesubset of the plurality of UEs, a reconfiguration complete messageindicating successful reception of the reconfiguration message; andrefraining from transmitting a subsequent wake-up signal according tothe configuration for the wake-up signal transmission based at least inpart on receiving the reconfiguration complete message from each UE ofthe subset of the plurality of UEs.
 15. The method of claim 9, whereintransmitting the wake-up signal comprises: transmitting, via the wake-upsignal, a plurality of respective bits for each UE of the subset of theplurality of UEs, the plurality of respective bits indicating one ormore cells for each UE of the subset of the plurality of UEs to wake up.16. The method of claim 9, further comprising: determining that the atleast one UE of the plurality of UEs is no longer connected to thenetwork device, wherein transmitting the reconfiguration message to thesubset of the plurality of UEs is based at least in part on thedetermining.
 17. A non-transitory computer-readable medium storing codefor wireless communications at a network device, the code comprisinginstructions executable by a processor to: transmit, to a plurality ofuser equipment (UEs), a configuration for receiving a wake-up signaltransmission for the plurality of UEs, the configuration comprising asize of the wake-up signal transmission and respective starting bitpositions indicating a portion of the wake-up signal transmissionintended for each UE of the plurality of UEs to read; transmit, to asubset of the plurality of UEs, a reconfiguration message for receivingthe wake-up signal transmission based at least in part on at least oneUE of the plurality of UEs being no longer connected to the networkdevice, the subset of the plurality of UEs being connected to thenetwork device and different from the at least one UE; and transmit, tothe subset of the plurality of UEs, a wake-up signal based at least inpart on the reconfiguration message.
 18. The non-transitorycomputer-readable medium of claim 17, wherein the instructions arefurther executable by the processor to: receive, from a UE of the subsetof the plurality of UEs, a radio link failure indication to release aconnection with the UE based at least in part on a number of errorpatterns occurring for the UE when receiving the wake-up signal; andattempt to reestablish the connection with the UE based at least in parton receiving the radio link failure indication.
 19. The non-transitorycomputer-readable medium of claim 18, wherein the radio link failureindication is received based at least in part on the number of errorpatterns satisfying a threshold value.
 20. The non-transitorycomputer-readable medium of claim 17, wherein the instructions arefurther executable by the processor to: receive, from each UE of thesubset of the plurality of UEs, a reconfiguration complete messageindicating successful reception of the reconfiguration message, whereinthe wake-up signal is transmitted according to the reconfigurationmessage based at least in part on receiving the reconfiguration completemessage from each UE of the subset of the plurality of UEs.